Merwinite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R070195 Moore P B, Araki T American Mineralogist 57 (1972) 1355-1374 Atomic arrangement of merwinite, Ca3Mg[SiO4]2, an unusual dense-packed structure of geophysical interest CELL PARAMETERS: 13.29133 5.306712 9.344628 90.00000 92.13368 90.00000 SPACE GROUP: P2_1/a X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 9.50 2.83 9.3382 0 0 1 13.36 4.18 6.6411 2 0 0 19.26 2.85 4.6138 0 1 1 20.28 1.41 4.3834 -1 1 1 20.52 2.44 4.3337 1 1 1 22.89 5.14 3.8883 -2 0 2 23.70 2.05 3.7568 2 1 1 26.87 9.05 3.3205 4 0 0 28.21 6.53 3.1655 3 1 1 29.15 1.37 3.0649 2 1 2 31.80 2.01 2.8149 4 1 0 32.51 29.93 2.7549 -4 0 2 32.96 8.76 2.7189 -4 1 1 33.38 100.00 2.6849 0 1 3 33.55 47.58 2.6719 4 1 1 33.79 41.89 2.6534 0 2 0 36.51 3.88 2.4619 2 1 3 38.66 2.63 2.3292 -3 1 3 38.81 8.52 2.3206 -5 1 1 39.05 10.36 2.3069 0 2 2 39.46 7.46 2.2840 5 1 1 39.79 4.21 2.2658 1 2 2 40.48 8.84 2.2285 -2 0 4 40.77 17.32 2.2137 6 0 0 41.19 1.17 2.1917 -2 2 2 41.48 9.36 2.1772 2 0 4 41.69 9.75 2.1668 2 2 2 42.30 1.38 2.1369 0 1 4 43.92 10.18 2.0614 -3 2 2 44.34 1.07 2.0431 6 1 0 44.63 7.78 2.0306 3 2 2 44.65 5.71 2.0297 -6 0 2 45.79 1.08 1.9817 6 1 1 47.58 39.31 1.9111 -4 2 2 47.99 1.08 1.8958 -6 1 2 48.49 24.09 1.8772 4 0 4 49.96 1.59 1.8255 -4 1 4 52.02 2.10 1.7579 -5 2 2 52.74 1.93 1.7356 -6 1 3 53.09 1.11 1.7248 -1 3 1 53.19 1.58 1.7218 1 3 1 53.93 2.55 1.6998 6 2 0 54.56 1.25 1.6817 6 1 3 55.33 3.17 1.6603 8 0 0 56.76 1.50 1.6216 -3 3 1 57.04 1.75 1.6143 3 2 4 57.05 2.11 1.6140 3 3 1 57.12 4.60 1.6121 -6 2 2 58.42 7.96 1.5794 -4 1 5 58.74 5.05 1.5714 -8 1 1 59.37 6.32 1.5564 0 0 6 59.80 4.87 1.5462 8 0 2 60.15 8.77 1.5379 0 3 3 60.26 9.21 1.5355 4 3 1 60.39 11.43 1.5324 4 2 4 61.07 1.41 1.5170 -8 1 2 61.64 1.21 1.5044 -2 3 3 64.10 1.55 1.4524 7 2 2 65.08 4.66 1.4328 -8 1 3 66.40 1.23 1.4074 8 2 0 66.51 1.79 1.4054 -4 3 3 66.66 2.33 1.4027 -6 1 5 67.22 5.10 1.3922 8 1 3 68.04 1.65 1.3774 -8 0 4 69.07 1.03 1.3595 -8 2 2 70.07 11.36 1.3425 0 2 6 70.46 4.94 1.3360 8 2 2 70.74 1.04 1.3314 1 2 6 70.83 1.19 1.3298 8 0 4 71.03 2.80 1.3267 0 4 0 71.18 3.62 1.3241 -2 2 6 71.43 2.20 1.3201 1 4 0 72.65 1.15 1.3010 2 4 0 73.35 1.29 1.2902 -10 0 2 74.66 1.40 1.2708 3 4 0 77.52 1.85 1.2309 4 2 6 77.44 2.03 1.2320 4 4 0 77.62 1.62 1.2296 -3 4 2 78.15 1.57 1.2225 -8 2 4 79.25 1.27 1.2083 -4 3 5 80.20 1.58 1.1964 8 3 1 80.29 2.22 1.1953 -4 4 2 80.63 3.68 1.1910 4 1 7 80.91 1.84 1.1876 8 1 5 82.86 1.11 1.1646 -6 2 6 87.50 1.06 1.1143 -4 0 8 87.88 1.64 1.1105 -6 4 2 87.88 1.64 1.1105 -6 4 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.