Poldervaartite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050144 Dai Y S, Harlow G E, McGhie A R American Mineralogist 78 (1993) 1082-1087 Poldervaartite, Ca(Ca0.5Mn0.5)(SiO3OH)(OH), a new acid nesosilicate from the Kalahari manganese field, South Africa: Crystal structure and description CELL PARAMETERS: 9.398000 9.139000 10.53500 90.00000 90.00000 90.00000 SPACE GROUP: Pbca X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 16.14 1.44 5.4879 1 1 1 17.11 13.03 5.1804 0 0 2 19.64 2.56 4.5180 1 0 2 19.57 1.81 4.5342 0 2 0 21.38 20.47 4.1539 0 2 1 21.59 23.00 4.1145 2 1 0 21.97 5.84 4.0439 1 1 2 23.25 17.70 3.8240 2 1 1 23.47 2.87 3.7882 1 2 1 25.83 24.27 3.4468 2 0 2 26.10 2.47 3.4119 0 2 2 27.56 9.36 3.2351 2 2 0 27.67 10.35 3.2219 2 1 2 27.86 100.00 3.2004 1 2 2 28.90 1.03 3.0880 2 2 1 29.30 2.00 3.0467 1 1 3 31.87 31.83 2.8058 3 1 1 32.32 21.50 2.7684 1 3 1 32.57 9.67 2.7474 0 2 3 32.61 3.56 2.7440 2 2 2 33.85 10.16 2.6462 3 0 2 33.87 1.81 2.6453 2 1 3 34.02 11.38 2.6333 1 2 3 34.61 19.73 2.5902 0 0 4 35.31 29.98 2.5402 3 1 2 35.47 18.36 2.5290 2 3 0 35.72 1.16 2.5124 1 3 2 35.99 2.56 2.4939 1 0 4 36.30 20.22 2.4731 3 2 1 36.55 4.20 2.4569 2 3 1 37.37 6.29 2.4047 1 1 4 38.09 49.74 2.3610 2 2 3 39.40 3.75 2.2854 3 2 2 39.63 5.38 2.2726 2 3 2 39.88 1.84 2.2590 2 0 4 40.06 6.41 2.2491 0 2 4 40.47 1.15 2.2275 3 1 3 40.71 1.45 2.2147 0 4 1 41.26 6.71 2.1868 4 1 1 41.29 2.48 2.1852 1 2 4 42.86 6.91 2.1086 4 0 2 42.80 1.51 2.1114 3 3 1 43.55 2.93 2.0769 0 4 2 43.98 6.70 2.0572 4 2 0 44.37 9.49 2.0404 2 3 3 44.49 3.41 2.0350 2 4 0 44.89 2.55 2.0178 4 2 1 44.69 13.73 2.0263 1 4 2 45.53 2.28 1.9911 3 3 2 45.39 2.10 1.9969 2 4 1 45.75 1.27 1.9819 3 0 4 46.89 3.12 1.9362 3 1 4 47.21 1.68 1.9237 1 3 4 47.52 9.08 1.9120 4 2 2 47.97 8.96 1.8952 0 4 3 48.00 2.60 1.8941 2 4 2 48.45 4.34 1.8776 4 1 3 49.03 1.28 1.8565 1 4 3 49.31 2.56 1.8466 1 2 5 49.66 2.17 1.8347 4 3 0 50.20 1.87 1.8160 3 2 4 50.39 1.60 1.8095 2 3 4 50.48 5.46 1.8066 4 3 1 51.68 1.92 1.7674 4 2 3 52.13 10.72 1.7533 2 4 3 52.40 14.43 1.7449 2 2 5 52.57 6.16 1.7396 5 0 2 52.99 3.67 1.7268 0 0 6 53.10 1.30 1.7234 4 0 4 53.61 1.14 1.7084 5 1 2 53.98 2.57 1.6974 1 0 6 53.69 2.94 1.7060 0 4 4 54.13 2.20 1.6931 4 1 4 54.28 8.36 1.6889 3 1 5 54.57 6.63 1.6806 1 3 5 54.48 5.60 1.6831 1 5 2 54.67 2.80 1.6776 1 4 4 55.00 3.18 1.6684 1 1 6 55.40 2.26 1.6574 3 3 4 56.63 6.94 1.6241 5 2 2 56.89 3.97 1.6174 2 0 6 56.78 2.51 1.6202 4 3 3 56.88 10.85 1.6175 4 4 0 57.14 4.65 1.6109 4 2 4 57.28 2.18 1.6073 3 2 5 57.45 2.19 1.6028 2 3 5 57.56 1.32 1.6002 2 4 4 57.87 1.06 1.5923 2 1 6 57.97 5.50 1.5896 1 2 6 58.28 4.25 1.5820 1 5 3 59.27 5.90 1.5580 5 3 1 60.07 2.76 1.5390 6 0 0 59.81 11.59 1.5451 3 5 1 60.75 2.93 1.5234 2 2 6 61.05 1.74 1.5166 2 5 3 61.45 2.82 1.5077 5 3 2 61.63 6.31 1.5037 5 0 4 61.29 3.36 1.5114 0 6 0 62.57 5.90 1.4835 5 1 4 63.70 1.78 1.4599 4 2 5 63.36 1.87 1.4668 1 5 4 64.09 4.26 1.4519 2 4 5 64.53 3.19 1.4431 6 2 1 64.14 3.11 1.4509 0 6 2 64.87 1.24 1.4364 2 6 0 65.02 1.57 1.4333 1 6 2 65.52 4.36 1.4237 3 5 3 66.08 1.11 1.4129 4 5 1 67.16 1.20 1.3927 2 1 7 68.32 2.21 1.3720 4 4 4 70.02 2.60 1.3427 6 2 3 70.30 1.77 1.3380 3 5 4 71.22 1.98 1.3231 6 0 4 71.24 3.73 1.3226 4 2 6 71.67 1.24 1.3158 1 3 7 73.83 1.72 1.2826 1 0 8 74.02 1.34 1.2797 3 2 7 74.34 1.71 1.2751 4 4 5 74.69 1.25 1.2699 1 1 8 75.11 1.18 1.2638 6 4 1 75.57 1.42 1.2573 7 2 1 76.43 1.90 1.2453 0 2 8 77.52 1.87 1.2304 7 2 2 76.93 1.18 1.2384 2 7 1 78.23 1.12 1.2211 7 1 3 78.68 2.16 1.2152 5 2 6 79.80 3.72 1.2009 7 3 1 81.47 1.23 1.1805 4 4 6 82.72 2.45 1.1657 7 1 4 82.09 1.77 1.1732 2 7 3 82.91 1.76 1.1635 3 7 2 84.77 1.55 1.1427 6 4 4 84.94 3.32 1.1409 5 6 2 85.64 1.51 1.1333 7 4 1 85.27 2.50 1.1373 0 6 6 86.00 2.09 1.1295 4 0 8 86.47 1.96 1.1245 0 4 8 86.61 1.28 1.1231 4 7 1 87.27 1.83 1.1163 1 4 8 87.60 2.22 1.1129 2 5 7 88.68 1.24 1.1022 5 4 6 90.27 2.07 1.0868 8 1 3 89.45 1.19 1.0947 2 8 1 91.12 2.31 1.0789 5 3 7 91.12 2.31 1.0789 5 3 7 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.