Information card for entry 9014884

Structure parameters

• Mineral name: Combeite
• Formula: Ca4 Na4 O18 Si6
• Calculated formula: Ca4 Na4 O18 Si6
• SMILES: [O-][Si]1([O-])O[Si]([O-])([O-])O[Si](O[Si](O[Si](O[Si](O1)([O-])[O-])([O-])[O-])([O-])[O-])([O-])[O-].[Ca+2].[Ca+2].[Na+].[Na+].[Ca+2].[Ca+2].[Na+].[Na+]
• Title of publication: Die Kristallstrukturen von naturlichem Na2Ca2Si3O9 vom Mt.Shaheru (Zaire) und aus dem Mayener Feld (Eifel) Note: this is the high-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: 10.429 Å
• b: 10.429 Å
• c: 13.149 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 1238.54 ų
• Number of distinct elements: 4
• Space group number: 166
• Hermann-Mauguin space group symbol: R -3 m :H
• Hall space group symbol: -R 3 2"
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No