Magnesium fluoride (MgF2) Appearance: colorless transparent Density: 3.18 g/cm3 Vapor pressure: 1 Pa at 1150癈 10 Pa at 1300癈 Hardness(Mohs hardness): 5~6 Melting point: 1260 Solubility: soluble in nitric acid Transmittance scope: 200~7000nm Refractive index(550nm): 1.38 Vapour deposition condition: evaporated by electron gun Vapour deposition temp.: 1300~1600℃ Purity: >99.99% Applications: anti-reflection film, multi-layer film, filter, spectroscope, etc. Specs: 1~2mm 1~3mm 1~5mm 2~3mm 2~4mm 3~5mm