Information card for entry 9010123

Structure parameters

• Mineral name: Topaz
• Formula: Al2 F1.56 H0.44 O4.44 Si
• Calculated formula: Al2 F1.56 H0.44 O4.44 Si
• Title of publication: New insight into crystal chemistry of topaz: a multi-methodological study Sample: Neutron refinement at T = 298 K
• Authors of publication: Diego Gatta, G.; Nestola, F.; Bromiley, G. D.; Loose, A.
• Journal of publication: American Mineralogist
• Year of publication: 2006
• Journal volume: 91
• Pages of publication: 1839 - 1846
• a: 4.667 Å
• b: 8.834 Å
• c: 8.395 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 346.111 ų
• Ambient diffraction temperature: 298 K
• Number of distinct elements: 5
• Space group number: 62
• Hermann-Mauguin space group symbol: P b n m
• Hall space group symbol: -P 2c 2ab
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No