CaCO3
– CalciteGe
– GermaniumTl(Br-Cl)
– KRS-6LaF3
– Lanthanum FluorideLiNbO3
– Lithium NiobateLiTaO3
– Lithium TantalateMgO
– Magnesium OxideSiO2
– Quartz CrystalAl2O3
– SapphireSi
– SiliconY3Al5O12
– YAGZnSe
– Zinc SelenideZnS
– Zinc SulphideZrO2
– Zirconia