Tridymite Kihara K, Matsumoto T, Imamura M Zeitschrift fur Kristallographie 177 (1986) 27-38 Structural change of orthorhombic-I tridymite with temperature: A study based on second-order thermal-vibrational parameters Note: hexagonal Gibbs model, T = 733 K Locality: synthetic refractory silica brick _database_code_amcsd 0020938 CELL PARAMETERS: 5.0520 5.0520 8.2700 90.000 90.000 120.000 SPACE GROUP: P6_3/mmc X-RAY WAVELENGTH: 1.541838 Cell Volume: 182.794 Density (g/cm3): 2.183 MAX. ABS. INTENSITY / VOLUME**2: 18.69756290 RIR: 2.789 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.30 100.00 4.3752 1 0 0 6 21.49 52.81 4.1350 0 0 2 2 23.00 54.14 3.8673 1 0 1 12 29.73 16.98 3.0052 1 0 2 12 35.54 21.31 2.5260 1 1 0 6 38.60 11.09 2.3323 1 0 3 12 41.91 1.98 2.1556 1 1 2 12 42.76 5.64 2.1148 2 0 1 12 43.79 2.02 2.0675 0 0 4 2 46.99 1.09 1.9337 2 0 2 12 53.47 3.76 1.7136 2 0 3 12 55.57 3.91 1.6537 2 1 0 12 56.77 2.98 1.6216 2 1 1 24 59.77 4.77 1.5471 1 0 5 12 60.28 1.74 1.5354 2 1 2 24 63.82 2.16 1.4584 3 0 0 6 65.86 3.41 1.4181 2 1 3 24 71.51 2.00 1.3193 2 0 5 12 75.24 1.75 1.2630 2 2 0 6 79.16 1.16 1.2099 1 1 6 12 79.32 1.06 1.2079 2 2 2 12 82.48 1.99 1.1694 2 1 5 24 87.92 1.05 1.1106 3 1 3 24 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.