Cristobalite Dove M T, Craig M S, Keen D A, Marshall W G, Redfern S A T, Trachenko K O, Tucker M G Mineralogical Magazine 64 (2000) 569-576 Crystal structure of the high-pressure monoclinic phase-II of cristobalite, SiO2 Locality: synthetic Note: P = 3.5 GPa, refinement by constrained Rietveld analysis _database_code_amcsd 0014542 CELL PARAMETERS: 8.3769 4.6020 9.0583 90.000 124.939 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 286.263 Density (g/cm3): 2.788 MAX. ABS. INTENSITY / VOLUME**2: 9.730329629 RIR: 1.136 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 22.51 5.40 3.9499 -1 1 1 4 22.73 28.26 3.9117 0 1 1 4 23.11 100.00 3.8485 -2 0 2 2 23.27 80.25 3.8229 1 1 0 4 23.97 74.15 3.7128 0 0 2 2 27.64 7.07 3.2268 -1 1 2 4 28.97 15.96 3.0824 -2 1 1 4 29.49 68.82 3.0286 1 1 1 4 30.27 34.96 2.9522 -2 1 2 4 30.95 5.81 2.8896 0 1 2 4 32.10 16.84 2.7883 -3 0 2 2 32.54 21.36 2.7520 2 1 0 4 33.37 12.86 2.6854 1 0 2 2 35.98 5.30 2.4962 -2 1 3 4 36.41 5.70 2.4674 -1 1 3 4 37.72 3.09 2.3847 -3 1 2 4 39.14 8.24 2.3013 -3 1 1 4 39.82 3.70 2.2640 2 1 1 4 39.84 16.33 2.2628 -2 0 4 2 40.24 3.24 2.2409 -3 1 3 4 40.94 13.56 2.2046 -1 2 1 4 41.07 10.82 2.1979 0 2 1 4 41.38 1.23 2.1818 1 2 0 4 41.42 1.05 2.1799 0 1 3 4 44.15 11.48 2.0511 -1 2 2 4 45.05 1.17 2.0125 -2 2 1 4 45.08 2.35 2.0112 2 0 2 2 45.41 2.15 1.9973 1 2 1 4 46.17 10.10 1.9661 -3 1 4 4 47.24 1.50 1.9243 -4 0 4 2 48.17 3.89 1.8892 -4 1 3 4 49.46 13.70 1.8429 2 1 2 4 49.87 5.74 1.8287 1 1 3 4 51.26 2.15 1.7823 -4 1 1 4 51.47 6.17 1.7753 -4 1 4 4 51.49 3.02 1.7747 -3 2 2 4 52.61 1.23 1.7395 -3 2 1 4 53.15 2.15 1.7232 2 2 1 4 53.20 1.04 1.7216 0 1 4 4 53.37 5.56 1.7168 4 0 0 2 54.44 1.31 1.6853 0 2 3 4 54.65 1.12 1.6795 -3 1 5 4 56.02 4.09 1.6416 -5 0 4 2 56.59 1.60 1.6264 -5 0 2 2 56.73 8.52 1.6228 3 2 0 4 58.46 3.20 1.5787 1 0 4 2 58.65 2.92 1.5740 -5 1 3 4 59.12 7.62 1.5627 -1 1 5 4 59.19 4.00 1.5610 -1 2 4 4 60.03 2.95 1.5412 -4 2 2 4 60.09 1.95 1.5397 -4 2 3 4 60.74 1.68 1.5249 2 1 3 4 62.16 1.48 1.4933 1 1 4 4 62.52 1.58 1.4856 -4 0 6 2 62.78 1.34 1.4801 -4 2 1 4 62.97 4.46 1.4761 -4 2 4 4 64.49 5.06 1.4448 0 2 4 4 64.79 2.79 1.4389 -2 3 1 4 65.07 1.99 1.4335 -3 1 6 4 65.08 2.14 1.4333 1 3 1 4 65.50 1.82 1.4250 -2 3 2 4 65.88 4.52 1.4178 0 3 2 4 66.09 2.13 1.4138 -4 1 6 4 66.25 2.07 1.4107 -2 2 5 4 66.75 9.30 1.4014 -5 0 6 2 66.79 5.54 1.4006 2 3 0 4 68.96 2.93 1.3617 -1 0 6 2 69.16 5.58 1.3583 -1 3 3 4 70.08 4.97 1.3427 2 0 4 2 70.20 1.85 1.3406 -5 1 6 4 70.46 3.16 1.3364 -5 2 4 4 70.93 2.58 1.3287 -6 0 2 2 70.97 8.70 1.3281 -5 2 2 4 71.39 3.87 1.3212 2 3 1 4 71.72 3.07 1.3161 5 1 0 4 72.41 3.99 1.3052 3 2 2 4 72.49 2.57 1.3039 0 3 3 4 72.63 2.73 1.3017 -6 1 5 4 72.73 4.16 1.3002 4 0 2 2 73.47 1.68 1.2889 2 1 4 4 75.33 1.11 1.2616 -3 2 6 4 75.91 1.29 1.2535 -3 3 4 4 76.31 1.23 1.2478 0 2 5 4 77.06 2.62 1.2376 0 0 6 2 77.35 2.87 1.2337 -2 2 6 4 77.35 2.27 1.2336 -4 3 2 4 77.41 4.01 1.2329 -4 3 3 4 78.40 1.21 1.2197 2 3 2 4 79.92 2.82 1.2004 -6 1 1 4 80.34 2.74 1.1951 0 1 6 4 80.42 1.26 1.1941 3 3 1 4 81.37 4.75 1.1825 0 3 4 4 81.64 3.20 1.1793 5 2 0 4 82.55 2.91 1.1686 -3 3 5 4 84.15 1.08 1.1505 0 4 0 2 85.53 1.01 1.1354 1 2 5 4 87.87 1.88 1.1111 2 1 5 4 88.50 1.51 1.1048 4 1 3 4 88.75 2.12 1.1023 -2 4 2 4 89.10 2.25 1.0989 0 4 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.