Barium Fluoride

Calcite

Calcium Fluoride

Caesium Bromide

Caesium Iodide

Germanium

KRS-5

KRS-6

Lithium Fluoride

Lithium Niobate

Lithium Tantalate

Magnesium Fluoride

Magnesium Oxide

Potassium Bromide

Potassium Chloride

Potassium Iodide

Quartz crystalline

Rubidium Bromide

Rubidium Chloride

Rubidium Iodide

Sapphire

Silicon

Silver Bromide

Silver Chloride

Sodium Chloride

Sodium Fluoride

Strontium Fluoride

Thallium Bromide

Titanium Dioxide (Rutile)

YAG (Yttrium Aluminium Garnet)

Zinc Selenide

Zinc Sulphide

Zirconia