Cristobalite II Dera P, Lazarz J D, Prakapenka V B, Barkley M, Downs R T Physics and Chemistry of Minerals 38 (2011) 517-529 New insights into the high-pressure polymorphism of SiO2 cristobalite Note: P = 7.4 GPa Locality: Ellora Caves, India _database_code_amcsd 0018350 CELL PARAMETERS: 7.8940 4.4560 8.5820 90.000 119.700 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 262.220 Density (g/cm3): 3.043 MAX. ABS. INTENSITY / VOLUME**2: 8.426460156 RIR: 0.902 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 23.26 5.24 3.8248 0 1 1 4 23.58 39.56 3.7732 -1 1 1 4 23.81 53.81 3.7364 1 1 0 4 23.87 100.00 3.7273 0 0 2 2 25.11 64.00 3.5464 -2 0 2 2 28.91 17.30 3.0884 -1 1 2 4 29.49 11.73 3.0287 1 1 1 4 30.26 77.40 2.9532 -2 1 1 4 31.29 48.55 2.8590 0 1 2 4 32.26 12.66 2.7748 -2 1 2 4 32.53 25.89 2.7522 1 0 2 2 32.96 33.76 2.7173 2 1 0 4 34.39 11.93 2.6075 -3 0 2 2 37.68 9.54 2.3875 -1 1 3 4 38.30 4.87 2.3500 -2 1 3 4 38.44 2.25 2.3416 1 1 2 4 39.51 12.48 2.2810 2 1 1 4 40.49 6.14 2.2280 0 2 0 2 40.50 15.46 2.2271 -3 1 1 4 41.61 4.44 2.1702 0 1 3 4 42.18 15.81 2.1422 -2 0 4 2 42.34 6.77 2.1347 0 2 1 4 42.53 3.59 2.1256 -1 2 1 4 42.67 4.96 2.1190 1 2 0 4 43.56 3.49 2.0777 -1 0 4 2 43.85 1.06 2.0646 2 0 2 2 45.91 20.64 1.9767 -1 2 2 4 46.03 2.69 1.9719 -4 0 2 2 46.30 1.19 1.9608 1 2 1 4 46.83 2.18 1.9398 -2 2 1 4 47.55 2.20 1.9124 0 2 2 4 48.24 1.38 1.8866 -2 2 2 4 48.33 15.75 1.8831 -1 1 4 4 49.21 2.20 1.8514 1 1 3 4 49.69 1.46 1.8347 -3 1 4 4 50.62 11.57 1.8032 -4 1 2 4 51.53 1.54 1.7735 3 1 1 4 51.54 1.84 1.7732 -4 0 4 2 51.71 2.63 1.7678 -4 1 3 4 53.28 4.30 1.7193 0 1 4 4 53.45 8.64 1.7142 4 0 0 2 53.70 3.57 1.7067 2 2 1 4 55.80 1.50 1.6475 -4 1 4 4 56.72 1.58 1.6228 3 0 2 2 56.78 3.33 1.6215 -3 2 3 4 57.29 4.45 1.6080 1 0 4 2 57.79 8.04 1.5954 3 2 0 4 58.43 1.10 1.5794 -3 1 5 4 59.45 2.88 1.5547 2 1 3 4 60.88 3.44 1.5216 -5 0 4 2 61.20 6.19 1.5144 2 2 2 4 62.14 6.32 1.4938 -3 2 4 4 62.50 4.18 1.4861 -4 1 5 4 62.53 2.06 1.4854 -5 1 3 4 64.73 2.41 1.4401 -4 2 1 4 64.74 1.40 1.4400 -5 1 4 4 65.27 7.59 1.4295 0 2 4 4 66.08 1.07 1.4139 0 1 5 4 66.30 1.15 1.4098 -5 1 1 4 66.95 4.03 1.3977 1 3 1 4 67.37 3.47 1.3900 -2 3 1 4 67.51 9.79 1.3874 -4 2 4 4 68.89 1.00 1.3629 2 3 0 4 69.06 3.10 1.3600 -3 1 6 4 69.79 1.55 1.3476 -2 1 6 4 69.88 1.66 1.3460 -3 2 5 4 69.94 11.98 1.3450 -1 0 6 2 70.81 2.82 1.3306 2 2 3 4 71.00 2.33 1.3276 4 0 2 2 71.99 10.26 1.3118 3 2 2 4 72.05 2.65 1.3107 5 1 0 4 72.19 5.62 1.3086 -2 3 3 4 72.28 3.82 1.3071 1 3 2 4 72.49 1.45 1.3039 1 2 4 4 72.50 3.54 1.3037 -6 0 4 2 73.19 3.85 1.2932 -5 0 6 2 73.36 5.91 1.2906 -3 3 2 4 73.65 2.78 1.2862 -3 3 1 4 73.69 5.71 1.2856 -6 0 2 2 74.13 2.78 1.2790 -5 2 2 4 74.64 3.28 1.2716 1 1 5 4 75.61 3.63 1.2577 -3 3 3 4 76.06 1.61 1.2513 -6 1 4 4 76.48 3.16 1.2455 3 3 0 4 78.33 2.99 1.2206 -2 3 4 4 79.25 2.91 1.2088 -6 1 5 4 79.96 3.40 1.1998 1 3 3 4 80.12 4.26 1.1978 5 1 1 4 80.45 1.08 1.1938 -2 2 6 4 81.55 1.01 1.1804 -6 1 1 4 81.77 1.05 1.1778 3 3 1 4 82.01 3.06 1.1750 -4 2 6 4 82.61 2.88 1.1679 5 2 0 4 84.61 1.71 1.1453 3 1 4 4 84.86 1.93 1.1426 -6 1 6 4 85.23 1.03 1.1386 -4 3 4 4 86.80 2.87 1.1220 -2 3 5 4 88.28 1.32 1.1070 6 1 0 4 88.32 1.79 1.1066 2 3 3 4 89.62 1.36 1.0939 1 1 6 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.