Optical grade fluorides (High purity, low Fe content)
* Lithium fluoride(LiF)
* Magnesium fluoride (MgF2)
* Barium fluoride (BaF2)
* Calcium fluoride(CaF2)
* Aluminum fluoride(AlF3)
* Zinc Fluoride(ZnF2)
* Strontium fluoride(SrF2)
* Lanthanum Fluoride(LaF3)