Information card for entry 1001720

Structure parameters

• Chemical name: Barium niobate silicate *
• Mineral name: Belkovite
• Formula: Ba3 Nb6 O26 Si4
• Calculated formula: Ba3 Nb6 O26 Si4
• Title of publication: De nouveaux oxydes a reseau forme d'octahedres NbO6 (TaO6) et de groupes Si2O7: Les phases A3Ta6Si4O26 (A = Ba,Sr) et K6M6Si4O26 (M = Nb,Ta) Locality: synthetic
• Authors of publication: Choisnet, J.; Nguyen, N.; Groult, D.; Raveau, B.
• Journal of publication: Materials Research Bulletin
• Year of publication: 1976
• Journal volume: 11
• Pages of publication: 887 - 894
• a: 8.981 Å
• b: 8.981 Å
• c: 7.84 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 547.6 ų
• Number of distinct elements: 4
• Space group number: 189
• Hermann-Mauguin space group symbol: P -6 2 m
• Hall space group symbol: P -6 -2
• Residual factor for all reflections: 0.046
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No