Information card for entry 9015837

Structure parameters

• Mineral name: Combeite
• Formula: Ca3.5 Na4.5 O18 Si6
• Calculated formula: Ca10.5 Na13.5 O54 Si18
• Title of publication: Die Kristallstrukturen von naturlichem Na2Ca2Si3O9 vom Mt.Shaheru (Zaire) und aus dem Mayener Feld (Eifel) Note: this is the low-temperature form of combeite
• Authors of publication: Fischer, R. X.; Tillmanns, E.
• Journal of publication: Neues Jahrbuch fur Mineralogie, Monatshefte
• Year of publication: 1983
• Journal volume: 1983
• Pages of publication: 49 - 59
• a: 10.464 Å
• b: 10.464 Å
• c: 13.176 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 1249.42 ų
• Number of distinct elements: 4
• Space group number: 145
• Hermann-Mauguin space group symbol: P 32
• Hall space group symbol: P 32
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No