Information card for entry 9009730

Structure parameters

• Mineral name: Akermanite
• Formula: Ca2 Fe0.446 Mg0.554 O7 Si2
• Calculated formula: Ca2 Fe0.446 Mg0.554 O7 Si2
• Title of publication: On variety of the Ca coordination in the incommensurate structure of synthetic iron-bearing akermanite, Ca2(Mg0.55,Fe0.45)Si2O7 Note: Sample is synthetic, this is the structure obtained from a standard refinement
• Authors of publication: Kusaka, K.; Ohmasa, M.; Hagiya, K.; Iishi, K.; Haga, N.
• Journal of publication: Mineralogical Journal
• Year of publication: 1998
• Journal volume: 20
• Pages of publication: 47 - 58
• a: 7.8679 Å
• b: 7.8679 Å
• c: 5.0144 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 310.411 ų
• Number of distinct elements: 5
• Space group number: 113
• Hermann-Mauguin space group symbol: P -4 21 m
• Hall space group symbol: P -4 2ab
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No