Tridymite Dollase W A Acta Crystallographica 23 (1967) 617-623 The crystal structure at 220 C of orthothombic high tridymite from the Steinbach meteorite Note: T = 220 C Locality: Steinbach meteorite _database_code_amcsd 0020733 CELL PARAMETERS: 8.7400 5.0400 8.2400 90.000 90.000 90.000 SPACE GROUP: C222_1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 362.969 Density (g/cm3): 2.199 MAX. ABS. INTENSITY / VOLUME**2: 11.47357341 RIR: 1.699 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.32 58.03 4.3700 2 0 0 2 20.34 100.00 4.3661 1 1 0 4 21.57 87.35 4.1200 0 0 2 2 23.04 29.42 3.8607 2 0 1 4 23.05 61.16 3.8580 1 1 1 4 29.80 9.85 2.9978 2 0 2 4 29.82 22.58 2.9965 1 1 2 4 35.59 22.26 2.5223 3 1 0 4 35.63 10.13 2.5200 0 2 0 2 37.28 1.04 2.4118 3 1 1 4 37.31 1.51 2.4098 0 2 1 4 38.72 6.20 2.3255 2 0 3 4 38.73 10.24 2.3249 1 1 3 4 42.00 2.36 2.1512 3 1 2 4 42.82 3.26 2.1120 4 0 1 4 42.86 6.06 2.1102 2 2 1 4 43.95 3.32 2.0600 0 0 4 2 47.11 1.67 1.9290 2 2 2 4 48.89 3.05 1.8630 1 1 4 4 53.60 2.41 1.7099 4 0 3 4 53.63 3.57 1.7090 2 2 3 4 55.65 2.36 1.6515 5 1 0 4 55.68 1.69 1.6509 4 2 0 4 55.72 1.23 1.6498 1 3 0 4 56.86 1.96 1.6193 5 1 1 4 56.88 2.02 1.6187 4 2 1 4 56.92 2.74 1.6177 1 3 1 4 59.99 2.75 1.5420 2 0 5 4 60.00 4.69 1.5418 1 1 5 4 60.39 1.15 1.5329 5 1 2 4 60.41 1.14 1.5324 4 2 2 4 60.44 1.17 1.5316 1 3 2 4 63.91 1.21 1.4567 6 0 0 2 63.97 1.83 1.4554 3 3 0 4 66.01 1.98 1.4153 5 1 3 4 66.03 1.70 1.4149 4 2 3 4 66.06 1.72 1.4143 1 3 3 4 71.74 1.28 1.3157 4 0 5 4 71.76 2.06 1.3153 2 2 5 4 75.37 1.70 1.2611 6 2 0 4 76.48 1.08 1.2455 0 4 1 4 79.46 1.29 1.2061 3 1 6 4 79.48 1.04 1.2059 6 2 2 4 82.73 1.17 1.1665 5 1 5 4 82.75 1.02 1.1663 4 2 5 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.