Information card for entry 9017470

Structure parameters

• Mineral name: Beta-diopside
• Formula: Ca Mg O6 Si2
• Calculated formula: Ca4 Mg4 O24 Si8
• Title of publication: Beta-diopside, a new ultrahigh-pressure polymorph of CaMgSi2O6 with six-coordinated silicon Note: P = 56.1 GPa
• Authors of publication: Plonka, A. M.; Dera, P.; Irmen, P.; Rivers, M. L.; Ehm, L.; Parise, J. B.
• Journal of publication: Geophysical Research Letters
• Year of publication: 2012
• Journal volume: 39
• Pages of publication: L24307 - 4
• a: 9.053 Å
• b: 7.677 Å
• c: 4.751 Å
• α: 90°
• β: 96.34°
• γ: 90°
• Cell volume: 328.175 ų
• Ambient diffracton pressure: 56100000 kPa
• Number of distinct elements: 4
• Space group number: 14
• Hermann-Mauguin space group symbol: P 1 21/c 1
• Hall space group symbol: -P 2ybc
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No