Information card for entry 9000455

Structure parameters

• Mineral name: Omphacite
• Formula: Al0.868 Ca1.03 Fe0.317 Mg0.815 Na0.97 O12 Si4
• Calculated formula: Al0.868 Ca1.03 Fe0.317 Mg0.815 Na0.97 O12 Si4
• Title of publication: The crystal structure of omphacite
• Authors of publication: Matsumoto, T.; Tokonami, M.; Morimoto, N.
• Journal of publication: American Mineralogist
• Year of publication: 1975
• Journal volume: 60
• Pages of publication: 634 - 641
• a: 9.585 Å
• b: 8.776 Å
• c: 5.26 Å
• α: 90°
• β: 106.8°
• γ: 90°
• Cell volume: 423.576 ų
• Number of distinct elements: 7
• Space group number: 13
• Hermann-Mauguin space group symbol: P 1 2/n 1
• Hall space group symbol: -P 2yac
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No