Anorthite



Chemical formula: CaO x Al2O3 x 2SiO2
Melting point: No data
Density: 2.72 - 2.75, average = 2.73 g/cm3
Hardness (Moh's): 6
Luminescence: Non-fluorescent
Crystal system: Triclinic - Pinacoidal
Cell dimensions: a=7.739 A, b=12.893 A, c=7.594 A
PDF number: 00-002-0523
ICSD number: 000654
Note: Calcium aluminum silicate. May contain some sodium replacing the calcium, but that amount must be less than 10 percent to be strictly Anorthite.










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