Tridymite Graetsch H Physics and Chemistry of Minerals 28 (2001) 313-321 X-ray powder diffraction study on the modulated high temperature forms of SiO2 tridymite between 110 and 220 C Sample: T = 150 C Locality: synthetic _database_code_amcsd 0008552 CELL PARAMETERS: 8.7560 5.0108 8.2153 90.000 90.283 90.000 SPACE GROUP: C2_1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 360.438 Density (g/cm3): 2.214 MAX. ABS. INTENSITY / VOLUME**2: 9.452403249 RIR: 1.390 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.28 65.61 4.3779 2 0 0 2 20.42 100.00 4.3490 1 1 0 2 21.63 97.98 4.1076 0 0 2 2 23.07 1.02 3.8557 2 0 1 2 23.12 82.33 3.8475 -1 1 1 2 23.16 11.16 3.8398 1 1 1 2 29.75 4.53 3.0029 -2 0 2 2 29.88 45.52 2.9899 -1 1 2 2 29.90 4.39 2.9882 2 0 2 2 29.96 52.91 2.9826 1 1 2 2 32.70 15.40 2.7384 0 0 3 2 35.60 1.94 2.5220 3 1 0 2 35.84 11.49 2.5054 0 2 0 1 37.25 1.63 2.4138 -3 1 1 2 37.34 1.09 2.4081 3 1 1 2 38.70 1.33 2.3268 -2 0 3 2 38.82 10.31 2.3199 -1 1 3 2 41.96 1.45 2.1533 -3 1 2 2 42.12 1.15 2.1452 3 1 2 2 42.25 1.33 2.1389 0 2 2 2 43.00 2.48 2.1034 -2 2 1 2 43.06 2.91 2.1008 2 2 1 2 44.09 3.18 2.0538 0 0 4 2 47.25 3.06 1.9238 -2 2 2 2 49.30 8.51 1.8485 0 2 3 2 53.74 1.78 1.7057 4 0 3 2 53.77 1.78 1.7049 -2 2 3 2 53.90 1.65 1.7009 2 2 3 2 55.59 1.39 1.6531 5 1 0 2 55.77 1.45 1.6484 4 2 0 2 56.75 1.18 1.6221 -5 1 1 2 56.86 1.05 1.6192 5 1 1 2 57.02 1.13 1.6151 4 2 1 2 57.25 1.98 1.6092 -1 3 1 2 57.27 1.57 1.6086 1 3 1 2 60.15 2.71 1.5383 -1 1 5 2 60.26 1.26 1.5358 1 1 5 2 60.46 2.02 1.5311 5 1 2 2 62.09 1.10 1.4949 -2 2 4 2 63.78 1.11 1.4593 6 0 0 2 66.17 1.12 1.4123 5 1 3 2 75.38 1.15 1.2610 6 2 0 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.