Diamond transmission
http://www.harricksci.com/infoserver/Optical%20Materials/Diamond.cfm
and for sapphire:
http://www.harricksci.com/infoserver/Optical%20Materials/sapphire.cfm
And Salt:
http://www.harricksci.com/infoserver/Optical%20Materials/Sodium%20Chloride.cfm
pure silicon:
http://www.harricksci.com/infoserver/Optical%20Materials/Silicon.cfm
