Information card for entry 9000170

Structure parameters

• Mineral name: Omphacite
• Formula: Al0.885 Ca1.165 Fe0.31 Mg0.805 Na0.835 O12 Si4
• Calculated formula: Al0.885 Ca1.165 Fe0.31 Mg0.805 Na0.835 O12 Si4
• Title of publication: Crystal-chemical characterization of omphacites
• Authors of publication: Clark, J. R.; Papike, J. J.
• Journal of publication: American Mineralogist
• Year of publication: 1968
• Journal volume: 53
• Pages of publication: 840 - 868
• a: 9.596 Å
• b: 8.771 Å
• c: 5.265 Å
• α: 90°
• β: 106.93°
• γ: 90°
• Cell volume: 423.932 ų
• Number of distinct elements: 7
• Space group number: 3
• Hermann-Mauguin space group symbol: P 1 2 1
• Hall space group symbol: P 2y
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No