Add lead-glass in materials

compact/materials.xml

@@ -60,16 +60,31 @@
     <composite n="2" ref="Na"/>
     <composite n="1" ref="O"/>
   </material>
+  <material name="PotassiumOxide">
+    <D type="density" value="2.320" unit="g/cm3"/>
+    <composite n="2" ref="K"/>
+    <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="ArsenicOxide">
+    <D type="density" value="3.738" unit="g/cm3"/>
+    <composite n="2" ref="As"/>
+    <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="LeadOxide">
+    <D type="density" value="9.530" unit="g/cm3"/>
+    <composite n="1" ref="Pb"/>
+    <composite n="1" ref="O"/>
+  </material>
   <material name="PyrexGlass">
     <D type="density" value="2.23" unit="g/cm3"/>
     <fraction n="0.806" ref="SiliconOxide"/>
@@ -77,6 +92,14 @@
     <fraction n="0.040" ref="SodiumOxide"/>
     <fraction n="0.023" ref="AluminumOxide"/>
   </material>
+  <material name="PbGlass">
+    <D type="density" value="3.86" unit="g / cm3"/>
+    <fraction n="0.5080" ref="LeadOxide"/>
+    <fraction n="0.4170" ref="SiliconOxide"/>
+    <fraction n="0.0422" ref="PotassiumOxide"/>
+    <fraction n="0.0278" ref="SodiumOxide"/>
+    <fraction n="0.0050" ref="ArsenicOxide"/>
+  </material>
   <material name="CarbonFiber">
     <D type="density" value="1.5" unit="g/cm3"/>
     <fraction n="0.65" ref="C"/>
@@ -189,8 +212,8 @@
     <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"/>	    
+    <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" />