Information card for entry 9016392

Structure parameters

• Mineral name: Alunite
• Formula: Al2.892 H6 K0.876 Na0.071 O14 S2
• Calculated formula: Al2.892 H6 K0.876 Na0.071 O14 S2
• Title of publication: Thermal expansion of alunite up to dehydroxylation and collapse of the crystal structure Note: T = 400 C
• Authors of publication: Zema, M.; Callegari, A. M.; Tarantino, S. C.; Gasparini, E.; Ghigna, P.
• Journal of publication: Mineralogical Magazine
• Year of publication: 2012
• Journal volume: 76
• Pages of publication: 613 - 623
• a: 6.9897 Å
• b: 6.9897 Å
• c: 17.574 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 743.564 ų
• Number of distinct elements: 6
• 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