Information card for entry 9001732

Structure parameters

• Mineral name: Cummingtonite
• Formula: Fe2.559 Mg4.441 O24 Si8
• Calculated formula: Fe2.559 Mg4.441 O24 Si8
• Title of publication: Crystal structure of a P2_1/m ferromagnesian cummingtonite at 140 K T = 140 K
• Authors of publication: Yang, H.; Smyth, J. R.
• Journal of publication: American Mineralogist
• Year of publication: 1996
• Journal volume: 81
• Pages of publication: 363 - 368
• a: 9.492 Å
• b: 18.093 Å
• c: 5.292 Å
• α: 90°
• β: 102.11°
• γ: 90°
• Cell volume: 888.617 ų
• Ambient diffraction temperature: 140 K
• Number of distinct elements: 4
• 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