Information card for entry 9013637

Structure parameters

• Mineral name: Akermanite
• Formula: Ca2 Mg O7 Si2
• Calculated formula: Ca2 Mg O7 Si2
• Title of publication: High-pressure behavior of akermanite and gehlenite and phase stability of the normal structures in melelites Note: P = 15 GPa
• Authors of publication: Merlini, M.; Gemmi, M.; Hanfland, M.; Crichton, W.
• Journal of publication: American Mineralogist
• Year of publication: 2009
• Journal volume: 94
• Pages of publication: 704 - 709
• a: 7.57 Å
• b: 7.57 Å
• c: 4.781 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 273.975 ų
• Ambient diffracton pressure: 15000000 kPa
• Number of distinct elements: 4
• 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