Information card for entry 9001696

Structure parameters

• Mineral name: Cummingtonite
• Formula: Al0.012 Ca0.086 Fe2.558 Mg4.344 O24 Si8
• Calculated formula: Al0.012 Ca0.086 Fe2.558 Mg4.344 O24 Si8
• Title of publication: Crystal structure of P2_1/m ferromagnesian amphibole and the role of cation ordering and composition in the P2_1/m - C2/m transition in cummingtonite Sample: UH1, untreated
• Authors of publication: Yang, H.; Hirschmann, M. M.
• Journal of publication: American Mineralogist
• Year of publication: 1995
• Journal volume: 80
• Pages of publication: 916 - 922
• a: 9.5015 Å
• b: 18.1289 Å
• c: 5.3089 Å
• α: 90°
• β: 102.09°
• γ: 90°
• Cell volume: 894.184 ų
• Number of distinct elements: 6
• Space group number: 12
• Hermann-Mauguin space group symbol: C 1 2/m 1
• Hall space group symbol: -C 2y
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No