<?xml version="1.0" ?>
<Heff_definition>
  <coefficient number="1" value="   0.4576470000E-01" text="(O1_x-O2_x)^1(O1_y-O2_y)^1(eta_2)^1">
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      <displacement_diff atom_a="2" atom_b="3" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight="-1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
  </coefficient>
  <coefficient number="2" value="  -0.2027370000E-02" text="(O3_z-O2_z[1 1 0])^2(eta_1)^1">
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      <displacement_diff atom_a="4" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 -1</cell_b>
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      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 -1</cell_b>
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
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        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
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        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="2">
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
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        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
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        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="2">
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="2">
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      <strain power=" 1" voigt=" 3"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
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      <strain power=" 1" voigt=" 1"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="z" power="2">
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      <strain power=" 1" voigt=" 2"/>
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    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 3"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 -1 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 -1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 2"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 1"/>
    </term>
  </coefficient>
  <coefficient number="3" value="  -0.4886910000E-01" text="(Sr_z-O1_z)^1(Sr_y-O1_y)^1(eta_4)^1">
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 6"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 4"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="1" atom_b="2" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="1" atom_b="2" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 4"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 5"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 4"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="1" atom_b="4" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="1" atom_b="4" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 6"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 1 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 6"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 5"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 4"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="1" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 5"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="1" atom_b="3" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="1" atom_b="3" direction="z" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 5"/>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="1" direction="x" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="1" direction="y" power="1">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <strain power=" 1" voigt=" 6"/>
    </term>
  </coefficient>
  <coefficient number="4" value="   0.2094670000E-02" text="(Ti_x-O2_x)^2(O1_y-O3_y)^2">
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 1 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 1 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 1 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="2" direction="y" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 1 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 1</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="3" atom_b="2" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="2" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="2" atom_b="4" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 1</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="0" atom_b="3" direction="z" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 0 0</cell_b>
      </displacement_diff>
    </term>
    <term weight=" 1.000000">
      <displacement_diff atom_a="0" atom_b="2" direction="y" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>1 0 0</cell_b>
      </displacement_diff>
      <displacement_diff atom_a="4" atom_b="3" direction="x" power="2">
        <cell_a>0 0 0</cell_a>
        <cell_b>0 1 0</cell_b>
      </displacement_diff>
    </term>
  </coefficient>
</Heff_definition>
