Diopside Plonka A M, Dera P, Irmen P, Rivers M L, Ehm L, Parise J B Geophysical Research Letters 39 (2012) L24307 Beta-diopside, a new ultrahigh-pressure polymorph of CaMgSi2O6 with six-coordinated silicon Note: P = 38.6 GPa Locality: natural, not reported _database_code_amcsd 0020130 CELL PARAMETERS: 9.2340 8.2550 4.9590 90.000 104.592 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 365.815 Density (g/cm3): 3.931 MAX. ABS. INTENSITY / VOLUME**2: 12.37915323 RIR: 1.025 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 21.53 3.37 4.1275 0 2 0 2 21.56 2.81 4.1215 -1 1 1 4 25.57 3.91 3.4844 1 1 1 4 28.52 5.06 3.1293 0 2 1 4 29.46 11.89 3.0318 2 2 0 4 31.94 25.27 2.8019 3 1 0 4 32.11 100.00 2.7874 -2 2 1 4 32.98 39.36 2.7161 -3 1 1 4 34.09 1.41 2.6298 1 3 0 4 37.48 43.49 2.3995 0 0 2 2 37.71 57.74 2.3856 2 2 1 4 37.77 27.72 2.3819 -1 3 1 4 37.83 4.53 2.3784 -2 0 2 2 40.31 2.72 2.2374 1 3 1 4 40.97 25.08 2.2030 3 1 1 4 42.84 9.62 2.1111 1 1 2 4 43.63 7.48 2.0744 0 2 2 4 43.87 1.55 2.0638 0 4 0 2 44.84 14.95 2.0212 3 3 0 4 45.63 17.65 1.9883 -3 3 1 4 45.87 9.29 1.9784 -4 2 1 4 46.21 1.50 1.9647 4 2 0 4 47.30 8.95 1.9218 2 0 2 2 47.99 21.64 1.8959 0 4 1 4 48.15 18.12 1.8897 -4 0 2 2 49.49 13.62 1.8418 -1 3 2 4 51.05 1.39 1.7891 -5 1 1 4 52.38 6.20 1.7468 5 1 0 4 52.53 2.61 1.7422 2 2 2 4 53.58 3.01 1.7105 1 3 2 4 56.70 9.60 1.6235 1 5 0 4 57.07 3.53 1.6139 -5 1 2 4 59.04 7.91 1.5647 0 4 2 4 59.24 2.74 1.5597 -1 5 1 4 59.35 5.31 1.5572 -3 1 3 4 60.66 19.91 1.5266 -2 2 3 4 60.72 11.22 1.5253 -5 3 1 4 61.13 5.95 1.5159 4 4 0 4 61.91 5.22 1.4988 5 3 0 4 62.35 3.71 1.4894 6 0 0 2 63.66 8.75 1.4617 4 0 2 2 64.53 8.71 1.4440 3 5 0 4 64.75 5.20 1.4397 -6 2 1 4 64.83 5.93 1.4381 -6 0 2 2 66.08 12.98 1.4140 -1 3 3 4 66.16 1.32 1.4123 -5 3 2 4 66.48 1.58 1.4064 2 4 2 4 66.72 1.01 1.4019 -4 2 3 4 66.77 1.03 1.4009 6 2 0 4 68.04 1.80 1.3779 4 2 2 4 68.16 3.13 1.3758 0 6 0 2 69.17 1.55 1.3581 -6 2 2 4 69.55 18.16 1.3517 5 3 1 4 71.19 6.65 1.3245 2 2 3 4 71.31 5.44 1.3226 0 6 1 4 71.66 2.73 1.3170 1 5 2 4 71.79 1.52 1.3149 2 6 0 4 72.10 9.84 1.3100 -3 5 2 4 72.58 2.07 1.3025 -7 1 1 4 73.21 1.02 1.2928 -2 6 1 4 73.70 2.02 1.2855 -2 4 3 4 74.67 1.59 1.2711 5 1 2 4 74.99 5.19 1.2665 6 2 1 4 75.02 1.09 1.2660 3 1 3 4 75.14 1.49 1.2643 0 4 3 4 75.33 1.01 1.2616 7 1 0 4 75.98 6.89 1.2525 -7 1 2 4 77.53 3.21 1.2312 -5 3 3 4 78.59 2.57 1.2172 -1 1 4 4 79.02 3.30 1.2117 -3 1 4 4 79.29 1.04 1.2083 -4 4 3 4 79.97 3.49 1.1998 0 0 4 2 80.47 3.06 1.1936 0 6 2 4 80.53 1.80 1.1928 4 4 2 4 80.68 3.58 1.1909 -2 6 2 4 80.80 1.46 1.1894 -7 3 1 4 80.82 2.53 1.1892 -4 0 4 2 81.97 8.28 1.1755 3 5 2 4 82.83 1.57 1.1654 5 3 2 4 84.68 1.44 1.1446 -1 7 1 4 84.85 1.03 1.1427 -4 2 4 4 85.30 2.41 1.1379 -7 1 3 4 86.28 2.50 1.1274 1 7 1 4 87.29 1.99 1.1170 8 0 0 2 87.56 1.29 1.1143 1 5 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.