Information card for entry 1544607

Structure parameters

• Common name: natural topaz
• Mineral name: topaz Al2.01Si1.00O4F1.57(OH)0.43
• Formula: Al2.01 F1.57 H0.43 O4.43 Si
• Calculated formula: Al2 F2 O4 Si
• Title of publication: Effect of temperature and pressure on the crystal structure of topaz, Al2SiO4(OH,F)2 : Sample Pax08 at 1 atm, room temperature
• Authors of publication: Komatsu, K.; Kuribayashi, T.; Kudoh, Y.
• Journal of publication: Journal of Mineralogical and Petrological Sciences
• Year of publication: 2003
• Journal volume: 98
• Pages of publication: 167 - 180
• a: 4.6489 ± 0.0024 Å
• b: 8.7935 ± 0.0039 Å
• c: 8.3957 ± 0.0039 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 343.2 ± 0.3 ų
• Ambient diffraction temperature: 298.15 K
• Ambient diffracton pressure: 1 kPa
• 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