Information card for entry 9002668

Structure parameters

• Common name: Phase-X
• Mineral name: Phase-X
• Formula: Al0.06 Cr0.02 K6 Mg1.84 O7 Si2
• Calculated formula: Al0.06 Cr0.02 K6 Mg1.84 O7 Si2
• Title of publication: The crystal structure and cation ordering of phase-X - (K1-x-n)2(Mg1-n[Al,Cr]n)2Si2O7H2x: A potential K- and H-bearing phase in the mantle
• Authors of publication: Mancini, F.; Harlow, G. E.; Cahill, C. L.
• Journal of publication: American Mineralogist
• Year of publication: 2002
• Journal volume: 87
• Pages of publication: 302 - 306
• a: 5.028 Å
• b: 5.028 Å
• c: 13.216 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 289.348 ų
• Number of distinct elements: 6
• Space group number: 185
• Hermann-Mauguin space group symbol: P 63 c m
• Hall space group symbol: P 6c -2
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No