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Fluorapatite - (CaF)Ca₄(PO₄)₃

Classification: Phosphate
Atomic numbers: 20, 9, 15 & 8
Atomic weight:
Melting point (C): 1200
Boiling point (C):
Density (g/cm3): 3.17-3.23
Refractive index (n=): 1.630-1.648
Hardness (Mosh-scratch): 5
Crystal structure: Hexagonal-tripyramidal: (2130) prism, 3rd order
Color (solid): Colorless to colored
Cleavage: Basal-imperfect: (0001)