Information card for entry 9001591

Structure parameters

• Mineral name: Topaz
• Formula: Al2 F2 O4 Si
• Calculated formula: Al2 F2 O4 Si
• Title of publication: The location of H in the high-pressure synthetic Al2SiO4(OH)2 topaz analogue Sample fluor-topaz from a Mexican rhyolite
• Authors of publication: Northrup, P. A.; Leinenweber, K.; Parise, J. B.
• Journal of publication: American Mineralogist
• Year of publication: 1994
• Journal volume: 79
• Pages of publication: 401 - 404
• a: 4.652 Å
• b: 8.801 Å
• c: 8.404 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 344.079 ų
• Number of distinct elements: 4
• 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