Information card for entry 9001445

Structure parameters

• Mineral name: Phase-B-superhydrous
• Formula: H4 Mg10 O18 Si3
• Calculated formula: H4 Mg10 O18 Si3
• Title of publication: Crystal structure of superhydrous B, a hydrous magnesium silicate synthesized at 1400 C and 20 GPa
• Authors of publication: Pacalo, R. E. G.; Parise, J. B.
• Journal of publication: American Mineralogist
• Year of publication: 1992
• Journal volume: 77
• Pages of publication: 681 - 684
• a: 5.0894 Å
• b: 13.968 Å
• c: 8.6956 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 618.159 ų
• Sample thermal history: synthesized at 1400 C
• Sample pressure history: synthesized at 1400 C and 20 GPa
• Number of distinct elements: 4
• Space group number: 58
• Hermann-Mauguin space group symbol: P n n m
• Hall space group symbol: -P 2 2n
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No