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 = 10.1 GPa Locality: Ellora Caves, India _database_code_amcsd 0018351 CELL PARAMETERS: 7.8030 4.3820 8.3660 90.000 118.700 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 250.913 Density (g/cm3): 3.181 MAX. ABS. INTENSITY / VOLUME**2: 7.728146186 RIR: 0.791 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 23.65 7.98 3.7623 0 1 1 4 24.02 41.13 3.7044 -1 1 1 4 24.12 43.45 3.6904 1 1 0 4 24.26 100.00 3.6691 0 0 2 2 25.69 59.70 3.4673 -2 0 2 2 29.55 25.89 3.0225 -1 1 2 4 29.78 8.58 2.9999 1 1 1 4 30.68 80.63 2.9137 -2 1 1 4 31.81 60.05 2.8132 0 1 2 4 32.77 30.27 2.7331 1 0 2 2 32.94 15.99 2.7191 -2 1 2 4 33.22 36.83 2.6971 2 1 0 4 34.94 18.94 2.5678 -3 0 2 2 38.53 13.40 2.3364 -1 1 3 4 38.83 1.83 2.3190 1 1 2 4 39.26 5.17 2.2950 -2 1 3 4 39.73 12.12 2.2687 2 1 1 4 40.90 19.64 2.2065 -3 1 1 4 41.20 8.96 2.1910 0 2 0 2 42.32 2.89 2.1358 0 1 3 4 43.09 2.00 2.0994 0 2 1 4 43.35 14.71 2.0873 -2 0 4 2 43.36 7.76 2.0867 1 2 0 4 44.00 2.31 2.0578 2 0 2 2 44.57 4.59 2.0329 -1 0 4 2 46.56 2.48 1.9505 -4 0 2 2 46.83 29.84 1.9400 -1 2 2 4 47.60 2.43 1.9103 -2 2 1 4 48.39 3.12 1.8811 0 2 2 4 48.90 1.91 1.8626 2 1 2 4 49.42 20.37 1.8441 -1 1 4 4 49.77 2.38 1.8321 1 1 3 4 51.00 3.16 1.7907 -3 1 4 4 51.27 11.63 1.7819 -4 1 2 4 51.72 2.96 1.7674 3 1 1 4 52.68 1.42 1.7374 -4 1 3 4 52.81 2.69 1.7337 -4 0 4 2 53.38 1.49 1.7164 -1 2 3 4 53.56 12.20 1.7111 4 0 0 2 54.20 3.56 1.6922 0 1 4 4 54.31 6.12 1.6891 2 2 1 4 56.84 1.12 1.6198 3 0 2 2 57.14 1.23 1.6121 -4 1 4 4 57.96 5.10 1.5912 1 0 4 2 58.00 4.22 1.5902 -3 2 3 4 58.40 5.57 1.5803 3 2 0 4 59.90 2.90 1.5443 2 1 3 4 60.08 1.40 1.5401 -3 1 5 4 61.86 8.84 1.5000 2 2 2 4 62.05 1.05 1.4956 1 1 4 4 62.15 3.76 1.4935 -5 0 4 2 63.51 2.28 1.4648 -5 1 3 4 63.67 5.92 1.4616 -3 2 4 4 63.72 1.02 1.4605 -5 1 2 4 64.22 4.19 1.4503 -4 1 5 4 65.32 1.75 1.4285 1 3 0 4 65.46 3.88 1.4258 -4 2 1 4 66.10 2.29 1.4136 -5 1 4 4 66.47 10.28 1.4066 0 2 4 4 66.71 1.88 1.4021 -5 1 1 4 67.28 1.35 1.3917 0 1 5 4 68.12 3.23 1.3765 1 3 1 4 68.61 1.45 1.3679 -2 3 1 4 69.09 12.03 1.3595 -4 2 4 4 71.08 3.88 1.3263 -3 1 6 4 71.10 2.38 1.3259 4 0 2 2 71.56 12.72 1.3186 -1 0 6 2 71.59 4.26 1.3181 2 2 3 4 71.66 1.03 1.3170 -2 1 6 4 71.75 1.48 1.3155 -3 2 5 4 72.32 2.45 1.3066 5 1 0 4 72.58 9.86 1.3025 3 2 2 4 73.52 5.84 1.2882 1 3 2 4 73.79 4.30 1.2841 -2 3 3 4 73.81 3.32 1.2839 -6 0 4 2 74.28 6.08 1.2769 -6 0 2 2 74.78 10.32 1.2696 -3 3 2 4 74.81 1.37 1.2691 4 1 2 4 74.89 1.68 1.2679 -3 3 1 4 75.10 3.21 1.2649 -5 2 2 4 75.35 5.13 1.2614 -5 0 6 2 75.69 5.50 1.2566 1 1 5 4 77.27 2.95 1.2348 -3 3 3 4 77.47 1.01 1.2321 -6 1 4 4 77.61 5.22 1.2301 3 3 0 4 80.21 4.72 1.1967 -2 3 4 4 80.33 4.80 1.1953 5 1 1 4 81.10 2.67 1.1858 -6 1 5 4 81.33 2.29 1.1830 1 3 3 4 82.01 1.78 1.1749 -6 1 1 4 83.22 4.13 1.1609 5 2 0 4 84.42 2.38 1.1475 -4 2 6 4 85.19 1.87 1.1390 3 1 4 4 87.13 1.05 1.1186 5 0 2 2 87.23 1.18 1.1176 -6 1 6 4 88.59 1.94 1.1039 6 1 0 4 89.03 1.96 1.0996 -2 3 5 4 89.64 1.80 1.0937 2 3 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.