Information card for entry 8104540

Structure parameters

• Common name: tridymite
• Mineral name: tridymite HP at 773 K
• Formula: O2 Si
• Calculated formula: O2 Si
• Title of publication: Structural change of orthorhombic-I tridymite with temperature: A study based on second-order thermal-vibrational parameters : HP structure at 773 K
• Authors of publication: Kihara, K.; Matsumoto, T.; Imamura, M.
• Journal of publication: Zeitschrift fur Kristallographie
• Year of publication: 1986
• Journal volume: 177
• Pages of publication: 27 - 38
• a: 5.052 ± 0.009 Å
• b: 5.052 ± 0.009 Å
• c: 8.27 ± 0.02 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 182.8 ± 0.6 ų
• Ambient diffraction temperature: 773 K
• Number of distinct elements: 2
• Space group number: 194
• Hermann-Mauguin space group symbol: P 63/m m c
• Hall space group symbol: -P 6c 2c
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No