<?xml version="1.0" encoding="UTF-8"?>
<materials>
  <!--
       Air by weight from

       http://www.engineeringtoolbox.com/air-composition-24_212.html
  -->
  <material name="Air">
    <D type="density" unit="g/cm3" value="0.0012"/>
    <fraction n="0.754" ref="N"/>
    <fraction n="0.234" ref="O"/>
    <fraction n="0.012" ref="Ar"/>
  </material>
  <!-- We model vacuum just as very thin air -->
  <material name="Vacuum">
    <D type="density" unit="g/cm3" value="0.0000000001"/>
    <fraction n="0.754" ref="N"/>
    <fraction n="0.234" ref="O"/>
    <fraction n="0.012" ref="Ar"/>
  </material>
  <material name="Epoxy">
    <D type="density" value="1.3" unit="g/cm3"/>
    <composite n="44" ref="H"/>
    <composite n="15" ref="C"/>
    <composite n="7" ref="O"/>
  </material>
  <material name="Quartz">
    <D type="density" value="2.2" unit="g/cm3"/>
    <composite n="1" ref="Si"/>
    <composite n="2" ref="O"/>
  </material>
  <material name="G10">
    <D type="density" value="1.7" unit="g/cm3"/>
    <fraction n="0.08" ref="Cl"/>
    <fraction n="0.773" ref="Quartz"/>
    <fraction n="0.147" ref="Epoxy"/>
  </material>
  <material name="Polystyrene">
    <D value="1.032" unit="g/cm3"/>
    <composite n="19" ref="C"/>
    <composite n="21" ref="H"/>
  </material>
  <material name="Steel235">
    <D value="7.85" unit="g/cm3"/>
    <fraction n="0.998" ref="Fe"/>
    <fraction n=".002" ref="C"/>
  </material>
  <material name="SiliconOxide">
    <D type="density" value="2.65" unit="g/cm3"/>
    <composite n="1" ref="Si"/>
    <composite n="2" ref="O"/>
  </material>
  <material name="BoronOxide">
    <D type="density" value="2.46" unit="g/cm3"/>
    <composite n="2" ref="B"/>
    <composite n="3" ref="O"/>
  </material>
  <material name="SodiumOxide">
    <D type="density" value="2.65" unit="g/cm3"/>
    <composite n="2" ref="Na"/>
    <composite n="1" ref="O"/>
  </material>
  <material name="AluminumOxide">
    <D type="density" value="3.89" unit="g/cm3"/>
    <composite n="2" ref="Al"/>
    <composite n="3" ref="O"/>
  </material>
  <material name="SiliconNitride">
    <D type="density" value="3.17" unit="g/cm3"/>
    <composite n="3" ref="Si"/>
    <composite n="4" ref="N"/>
  </material>
  <material name="PyrexGlass">
    <D type="density" value="2.23" unit="g/cm3"/>
    <fraction n="0.806" ref="SiliconOxide"/>
    <fraction n="0.130" ref="BoronOxide"/>
    <fraction n="0.040" ref="SodiumOxide"/>
    <fraction n="0.023" ref="AluminumOxide"/>
  </material>
  <material name="CarbonFiber">
    <D type="density" value="1.5" unit="g/cm3"/>
    <fraction n="0.65" ref="C"/>
    <fraction n="0.35" ref="Epoxy"/>
  </material>
  <material name="CarbonFiber_50D">
    <D type="density" value="0.75" unit="g/cm3"/>
    <fraction n="0.65" ref="C"/>
    <fraction n="0.35" ref="Epoxy"/>
  </material>
  <material name="Rohacell31">
    <D type="density" value="0.032" unit="g/cm3"/>
    <composite n="9" ref="C"/>
    <composite n="13" ref="H"/>
    <composite n="2" ref="O"/>
    <composite n="1" ref="N"/>
  </material>
  <material name="Rohacell31_50D">
    <D type="density" value="0.016" unit="g/cm3"/>
    <composite n="9" ref="C"/>
    <composite n="13" ref="H"/>
    <composite n="2" ref="O"/>
    <composite n="1" ref="N"/>
  </material>
  <material name="RPCGasDefault" state="gas">
    <D type="density" value="0.0037" unit="g/cm3"/>
    <composite n="209" ref="C"/>
    <composite n="239" ref="H"/>
    <composite n="381" ref="F"/>
  </material>
  <material name="PolystyreneFoam">
    <D type="density" value="0.0056" unit="g/cm3"/>
    <fraction n="1.0" ref="Polystyrene"/>
  </material>
  <material name="Kapton">
    <D value="1.43" unit="g/cm3"/>
    <composite n="22" ref="C"/>
    <composite n="10" ref="H"/>
    <composite n="2" ref="N"/>
    <composite n="5" ref="O"/>
  </material>
  <material name="PEEK">
    <D value="1.37" unit="g/cm3"/>
    <composite n="19" ref="C"/>
    <composite n="12" ref="H"/>
    <composite n="3" ref="O"/>
  </material>
  <material name="TungstenDens23">
    <D value="17.7" unit="g / cm3"/>
    <fraction n="0.925" ref="W"/>
    <fraction n="0.066" ref="Ni"/>
    <fraction n="0.009" ref="Fe"/>
  </material>
  <material name="TungstenDens24">
    <D value="17.8" unit="g / cm3"/>
    <fraction n="0.93" ref="W"/>
    <fraction n="0.061" ref="Ni"/>
    <fraction n="0.009" ref="Fe"/>
  </material>
  <material name="TungstenDens25">
    <D value="18.2" unit="g / cm3"/>
    <fraction n="0.950" ref="W"/>
    <fraction n="0.044" ref="Ni"/>
    <fraction n="0.006" ref="Fe"/>
  </material>
  <material name="CarbonFiber_25percent">
    <D type="density" value="0.375" unit="g / cm3"/>
    <fraction n="1.0" ref="CarbonFiber"/>
  </material>
  <material name="CarbonFiber_15percent">
    <D type="density" value="0.225" unit="g / cm3"/>
    <fraction n="1.0" ref="CarbonFiber"/>
  </material>
  <material name="Rohacell31_50percent">
    <D type="density" value="0.016" unit="g / cm3"/>
    <fraction n="1.0" ref="Rohacell31"/>
  </material>
  <material name="Rohacell31_15percent">
    <D type="density" value="0.0048" unit="g / cm3"/>
    <fraction n="1.0" ref="Rohacell31"/>
  </material>
  <material name="BoratedPolyethylene5">
    <D value="0.93" unit="g / cm3"/>
    <fraction n="0.612" ref="C"/>
    <fraction n="0.222" ref="O"/>
    <fraction n="0.116" ref="H"/>
    <fraction n="0.050" ref="B"/>
  </material>
  <material name="SiliconCarbide">
    <D value="3.1" unit="g / cm3"/>
    <composite n="1" ref="Si"/>
    <composite n="1" ref="C"/>
  </material>
  <material name="SiliconCarbide_6percent">
    <D value="0.186" unit="g / cm3"/>
    <fraction n="1.0" ref="SiliconCarbide"/>
  </material>
  <material name="PlasticScint">
    <D type="density" unit="g/cm3" value="1.032"/>
    <composite n="9" ref="C"/>
    <composite n="10" ref="H"/>
  </material>
  <material name="PbWO4">
    <D type="density" value="8.3" unit="g / cm3"/>
    <composite n="1" ref="Pb"/>
    <composite n="1" ref="W"/>
    <composite n="4" ref="O"/>
  </material>
  <material name="Ar10CO2">
    <D type="density" value="1.802" unit="mg / cm3"/>
    <composite n="0.891" ref="Argon"/>
    <!--<composite n="0.109" ref="CarbonDioxide"/>-->
    <composite n="0.036" ref="C"/>	    
    <composite n="0.073" ref="O"/>	    
  </material>
  <material name="Mylar">
    <D type="density" value="1.39" unit="g/cm3" />
    <fraction n="0.62502108" ref="C"/>
    <fraction n="0.041960452" ref="H"/>
    <fraction n="0.33301847" ref="O"/>
  </material>
  <material name="Nomex">
    <D type="density" value="0.029" unit="g/cm3" />
    <composite n="14" ref="C"/>
    <composite n="10" ref="H"/>
    <composite n="2" ref="N"/>
    <composite n="2" ref="O"/>
  </material>
  <material name="Fr4_Epoxy">
    <D type="density" value="1.2" unit="g/cm3"/>
    <composite n="2" ref="H"/>
    <composite n="2" ref="C"/>
  </material>
  <material name="Fr4">
    <D type="density" value="1.86" unit="g/cm3"/>
    <fraction n="0.528" ref="Quartz"/>
    <fraction n="0.472" ref="Fr4_Epoxy"/>
  </material>
  <material name="Cfrp_intt">
    <D type="density" value="1.69" unit="g/cm3"/>
    <composite n="10" ref="C"/>
    <composite n="6" ref="H"/>
    <composite n="1" ref="O"/>
  </material>
  <material name="Graphite">
    <D type="density" value="2.21" unit="g/cm3"/>
    <composite n="1" ref="C"/>
  </material>

</materials>