... can be used in ARC multi-layer, beam splitting, MgF2 powder is a common coating materials with low refractive index. It ... :MgF23. molecular weight:62.314. characteristics: colorless crystal or white powder, its provided with violet fluorecence in the light, relative density ... 3.148; M.P.:1261 ; bolling point 2239 , soluble in nitric acid, slightly ...