Seifertite Dera P, Prewitt C T, Boctor N Z, Hemley R J American Mineralogist 87 (2002) 1018-1023 Characterization of a high-pressure phase of silica from the Martian meteorite Shergotty alpha-PbO2-like _database_code_amcsd 0002871 CELL PARAMETERS: 4.0970 5.0462 4.4946 90.000 90.000 90.000 SPACE GROUP: Pbcn X-RAY WAVELENGTH: 1.541838 Cell Volume: 92.923 Density (g/cm3): 4.294 MAX. ABS. INTENSITY / VOLUME**2: 16.09794026 RIR: 1.221 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 28.05 68.63 3.1807 1 1 0 4 34.55 100.00 2.5963 1 1 1 8 35.58 4.09 2.5231 0 2 0 2 40.12 4.00 2.2473 0 0 2 2 41.02 6.78 2.2001 0 2 1 4 46.07 31.10 1.9703 1 0 2 4 46.87 60.72 1.9383 1 2 1 8 49.67 15.19 1.8354 1 1 2 8 54.69 2.22 1.6782 0 2 2 4 57.99 1.86 1.5903 2 2 0 4 59.40 15.84 1.5560 1 3 0 4 61.22 30.66 1.5139 2 0 2 4 61.89 52.25 1.4993 2 2 1 8 63.24 1.30 1.4704 1 3 1 8 69.33 13.88 1.3554 1 1 3 8 71.58 1.09 1.3182 3 1 0 4 72.86 1.66 1.2982 2 2 2 8 73.52 25.96 1.2882 0 2 3 4 74.11 12.24 1.2793 1 3 2 8 75.10 11.43 1.2650 3 1 1 8 75.34 9.90 1.2615 0 4 0 2 78.80 2.39 1.2146 0 4 1 4 82.69 2.81 1.1671 3 0 2 4 83.27 5.74 1.1603 3 2 1 8 85.37 4.31 1.1371 3 1 2 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.