Information card for entry 9004995

Structure parameters

• Mineral name: Nepheline
• Formula: Al4 Ca0.285 K0.1 Na3.33 O16 Si4
• Calculated formula: Al4 Ca0.285 K0.1 Na3.33 O16 Si4
• Title of publication: The crystal structure of a K-poor Ca-rich silicate with the nepheline framework, and crystal-chemical relationships in the compositional space (K,Na,Ca,_)8(Al,Si)16O32
• Authors of publication: Rossi, G.; Oberti, R.; Smith, D. C.
• Journal of publication: European Journal of Mineralogy
• Year of publication: 1989
• Journal volume: 1
• Pages of publication: 59 - 70
• a: 9.982 Å
• b: 9.982 Å
• c: 8.364 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 721.738 ų
• Number of distinct elements: 6
• Space group number: 173
• Hermann-Mauguin space group symbol: P 63
• Hall space group symbol: P 6c
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No