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Calcium Fluoride - CaF₂

Classification: Fluoride
Atomic numbers: 20 & 9
Atomic weight: 76.08
Melting point (C): 1360
Boiling point (C):
Density (g/cm3): 3.18 (3.01-3.25)
Refractive index (n=): 1.4339
Hardness (Mosh-scratch): 4
Crystal structure: Isometric-normal: (100) cube
Color (solid): Yellow-green/variable
Cleavage: Octahedral-distinct: o(111)