Information card for entry 9001172

Structure parameters

• Mineral name: Anorthite
• Formula: Al Ca O4 Si
• Calculated formula: Al Ca O4 Si
• Title of publication: High-pressure structure of anorthite Sample: P = 25 kbar
• Authors of publication: Angel, R. J.
• Journal of publication: American Mineralogist
• Year of publication: 1988
• Journal volume: 73
• Pages of publication: 1114 - 1119
• a: 8.082 Å
• b: 12.767 Å
• c: 14.032 Å
• α: 92.79°
• β: 115.77°
• γ: 91.68°
• Cell volume: 1300.27 ų
• Ambient diffracton pressure: 2500000 kPa
• Number of distinct elements: 4
• Space group number: 2
• Hermann-Mauguin space group symbol: I -1
• Hall space group symbol: -P 1 (-1/2*x+1/2*y+1/2*z,1/2*x-1/2*y+1/2*z,1/2*x+1/2*y-1/2*z)
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No