Information card for entry 9001698

Structure parameters

• Mineral name: Cummingtonite
• Formula: Al0.014 Ca0.1 Fe2.473 Mg4.423 O24 Si8
• Calculated formula: Al0.014 Ca0.1 Fe2.473 Mg4.423 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: 1c, heat treated at 700 C
• 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: 9.5057 Å
• b: 18.1187 Å
• c: 5.3059 Å
• α: 90°
• β: 102.031°
• γ: 90°
• Cell volume: 893.768 ų
• Number of distinct elements: 6
• Space group number: 11
• Hermann-Mauguin space group symbol: P 1 21/m 1
• Hall space group symbol: -P 2yb
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No