OpenMC/tests/regression_tests/lattice_hex_x/inputs_true.dat

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      <nuclide ao="0.018744" name="U238"/>
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      <nuclide ao="6.6262e-06" name="B10"/>
      <nuclide ao="2.6839e-05" name="B11"/>
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      <nuclide ao="4.7344e-06" name="B11"/>
      <nuclide ao="1.9177e-05" name="B10"/>
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      <density units="sum"/>
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      <nuclide ao="0.00474606" name="Zr91"/>
      <nuclide ao="0.00725445" name="Zr92"/>
      <nuclide ao="0.00735174" name="Zr94"/>
      <nuclide ao="0.0011844" name="Zr96"/>
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    <cell id="2" material="4" region="-2 1" universe="1"/>
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    <cell id="11" material="2" region="8" universe="3"/>
    <cell id="12" material="2" universe="4"/>
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      <outer>4</outer>
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 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1
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 1 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1
1 1 1 1 1 3 1 1 1 1 2 1 1 1 1 3 1 1 1 1 1
 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1
  1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1
   1 1 1 1 3 1 1 1 3 1 1 1 1 3 1 1 1 1
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     1 1 1 1 1 3 1 1 1 1 3 1 1 1 1 1
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       1 1 1 1 1 1 1 1 1 1 1 1 1 1
        1 1 1 1 1 1 1 1 1 1 1 1 1
         1 1 1 1 1 1 1 1 1 1 1 1
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    <surface boundary="reflective" coeffs="-1.7320508075688772 1.0 0.0 -23.6" id="14" type="plane"/>
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  <settings>
    <run_mode>eigenvalue</run_mode>
    <particles>1000</particles>
    <batches>10</batches>
    <inactive>5</inactive>
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      <space type="box">
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    <seed>22</seed>
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