Gillespite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R061031 Miletich R, Allan D R, Angel R J American Mineralogist 82 (1997) 697-707 The synthetic Cr2+ silicates BaCrSi4O10 and SrCrSi4O10: The missing links in the gillespite-type ABSi4O10 series BaCrSi4O10 CELL PARAMETERS: 7.520168 7.520168 16.08625 90.00000 90.00000 90.00000 ALTERNATE SETTING FOR SPACE GROUP: P4/ncc X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 11.04 37.87 8.0431 0 0 2 16.70 13.49 5.3176 1 1 0 20.05 53.40 4.4358 1 1 2 22.13 5.18 4.0216 0 0 4 25.14 23.59 3.5463 1 0 4 26.19 100.00 3.4062 2 0 2 27.11 7.24 3.2919 2 1 1 27.84 64.93 3.2076 1 1 4 28.79 29.45 3.1028 2 1 2 32.62 33.92 2.7466 2 0 4 33.44 4.07 2.6810 0 0 6 33.73 34.60 2.6588 2 2 0 35.58 12.85 2.5244 2 2 2 37.60 2.57 2.3932 3 0 2 37.58 28.43 2.3940 1 1 6 37.85 9.30 2.3781 3 1 0 38.27 1.26 2.3525 3 1 1 39.53 18.65 2.2805 3 1 2 40.69 8.77 2.2179 2 2 4 41.37 2.09 2.1830 2 0 6 43.16 2.83 2.0964 2 1 6 43.77 2.14 2.0684 3 2 1 44.26 21.50 2.0470 3 1 4 44.90 1.55 2.0189 3 2 2 45.09 4.88 2.0108 0 0 8 46.77 6.32 1.9425 1 0 8 47.55 1.51 1.9124 3 1 5 48.21 3.18 1.8879 2 2 6 48.42 17.28 1.8800 4 0 0 48.40 7.13 1.8808 1 1 8 49.21 6.69 1.8515 3 2 4 49.81 3.93 1.8307 4 0 2 50.35 2.06 1.8123 4 1 1 51.36 21.51 1.7791 3 1 6 51.54 2.98 1.7732 2 0 8 52.89 3.33 1.7310 3 3 2 54.57 6.31 1.6816 4 2 0 55.30 2.20 1.6611 4 1 4 55.85 16.76 1.6460 4 2 2 56.75 9.87 1.6220 3 3 4 57.46 2.65 1.6038 2 2 8 59.58 2.88 1.5514 4 2 4 60.10 3.07 1.5393 4 0 6 60.08 1.40 1.5397 1 1 10 60.27 6.45 1.5355 3 1 8 61.96 1.52 1.4975 4 3 1 62.85 1.22 1.4784 4 3 2 62.84 3.92 1.4786 3 3 6 62.82 10.86 1.4790 2 0 10 64.19 3.56 1.4506 5 1 2 64.34 4.47 1.4476 3 2 8 65.64 1.49 1.4220 5 1 3 66.34 1.48 1.4087 5 0 4 67.65 8.65 1.3847 5 1 4 68.14 3.88 1.3759 5 2 2 68.11 1.66 1.3763 2 2 10 68.28 3.77 1.3733 4 0 8 69.57 1.77 1.3509 4 1 8 70.19 1.93 1.3405 0 0 12 70.87 1.79 1.3294 4 4 0 70.68 1.37 1.3324 3 1 10 70.85 2.06 1.3297 3 3 8 71.98 1.42 1.3116 4 4 2 73.23 4.90 1.2922 5 1 6 73.39 1.63 1.2897 5 3 0 73.38 2.12 1.2899 4 2 8 74.49 1.88 1.2734 5 3 2 75.89 1.04 1.2534 6 0 0 76.77 1.40 1.2412 5 1 7 76.97 1.98 1.2384 6 0 2 77.74 1.91 1.2281 5 3 4 79.56 1.57 1.2044 5 0 8 80.16 4.58 1.1970 2 2 12 80.80 1.17 1.1890 6 2 0 80.78 2.39 1.1892 5 1 8 81.86 2.73 1.1763 6 2 2 82.59 1.39 1.1678 3 1 12 83.07 5.64 1.1622 5 3 6 83.05 6.03 1.1624 4 2 10 85.04 2.55 1.1402 6 2 4 88.04 1.40 1.1089 4 4 8 89.82 1.66 1.0915 4 0 12 89.82 1.66 1.0915 4 0 12 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.