Afwillite Megaw H D Acta Crystallographica 5 (1952) 477-491 The structure of afwillite, Ca3(SiO3OH)2*2H2O Locality: Scawt Hill, Northern Ireland _database_code_amcsd 0009147 CELL PARAMETERS: 16.2700 5.6320 13.2300 90.000 134.800 90.000 SPACE GROUP: Cc X-RAY WAVELENGTH: 1.541838 Cell Volume: 860.212 Density (g/cm3): 2.662 MAX. ABS. INTENSITY / VOLUME**2: 7.969912234 RIR: 0.975 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.54 45.77 6.5390 -2 0 2 1 15.35 1.84 5.7724 2 0 0 1 17.14 5.51 5.1727 -1 1 1 2 17.52 13.18 5.0618 1 1 0 2 18.91 6.92 4.6938 0 0 2 1 21.48 3.79 4.1376 -1 1 2 2 22.03 1.82 4.0354 -4 0 2 1 22.92 3.64 3.8801 -3 1 2 2 23.77 8.36 3.7427 -3 1 1 2 25.84 1.37 3.4473 -3 1 3 2 27.28 17.02 3.2695 -4 0 4 1 28.08 100.00 3.1774 3 1 0 2 28.53 6.37 3.1289 -1 1 3 2 29.29 11.95 3.0494 -2 0 4 1 29.69 12.75 3.0093 1 1 2 2 31.58 88.64 2.8333 -3 1 4 2 31.78 52.79 2.8160 0 2 0 2 31.79 1.18 2.8152 -5 1 3 2 32.84 81.38 2.7272 -5 1 2 2 33.22 1.21 2.6973 0 2 1 2 33.48 1.99 2.6766 -6 0 4 1 33.60 1.15 2.6670 -5 1 4 2 33.71 11.49 2.6588 -2 2 1 2 34.67 6.35 2.5871 3 1 1 2 34.68 2.79 2.5864 -2 2 2 2 35.86 1.93 2.5043 -6 0 2 1 36.91 4.30 2.4356 -1 1 4 2 37.24 1.01 2.4148 0 2 2 2 38.35 19.70 2.3469 0 0 4 1 39.00 11.50 2.3093 -4 2 2 2 39.51 2.40 2.2808 -4 2 3 2 39.64 4.75 2.2735 2 2 1 2 40.91 1.55 2.2060 -4 2 1 2 41.43 4.20 2.1797 -6 0 6 1 42.04 21.27 2.1493 -4 0 6 1 42.31 7.92 2.1364 5 1 0 2 42.36 7.11 2.1337 -4 2 4 2 42.64 6.59 2.1202 3 1 2 2 43.17 1.23 2.0955 -7 1 5 2 43.22 1.83 2.0932 0 2 3 2 43.76 1.47 2.0688 -2 2 4 2 44.14 6.56 2.0520 -5 1 6 2 44.98 4.44 2.0156 4 2 0 2 45.68 9.94 1.9861 2 2 2 2 46.44 8.70 1.9554 -7 1 6 2 46.53 2.16 1.9517 -7 1 2 2 46.70 2.97 1.9452 -6 2 3 2 46.72 10.85 1.9443 -8 0 6 1 46.83 7.85 1.9401 -6 2 4 2 47.18 1.82 1.9264 4 0 2 1 47.24 3.54 1.9241 6 0 0 1 47.47 7.76 1.9153 1 1 4 2 47.55 1.27 1.9122 -3 1 6 2 49.02 1.18 1.8583 -1 3 1 2 49.04 8.86 1.8576 -6 2 5 2 50.63 27.29 1.8029 0 2 4 2 51.33 2.84 1.7801 2 0 4 1 51.50 20.42 1.7746 -8 0 2 1 52.02 4.48 1.7579 -3 3 1 2 53.11 4.50 1.7245 2 2 3 2 53.12 1.22 1.7242 -3 3 3 2 53.14 1.79 1.7236 -6 2 6 2 53.64 1.42 1.7085 -4 2 6 2 53.90 9.46 1.7011 -9 1 6 2 54.38 6.74 1.6873 3 3 0 2 54.63 10.36 1.6799 -1 3 3 2 55.32 2.10 1.6606 1 3 2 2 56.49 7.49 1.6291 -3 3 4 2 56.62 1.08 1.6257 -5 3 3 2 56.63 3.17 1.6252 -10 0 6 1 57.29 4.48 1.6082 -5 3 2 2 57.61 15.35 1.6000 -8 2 6 2 57.92 9.70 1.5921 5 1 2 2 58.01 1.57 1.5900 4 2 2 2 58.14 3.71 1.5867 -7 1 8 2 59.05 1.15 1.5645 -2 2 6 2 59.30 1.83 1.5585 -10 0 4 1 60.36 1.37 1.5336 -5 1 8 2 60.75 1.11 1.5247 -4 0 8 1 61.25 4.32 1.5133 3 1 4 2 61.50 1.42 1.5077 -3 3 5 2 61.79 5.96 1.5014 -8 2 2 2 63.93 1.49 1.4563 6 0 2 1 65.30 1.98 1.4290 -5 3 6 2 66.09 3.26 1.4138 -8 2 8 2 66.37 1.56 1.4086 -1 1 7 2 66.40 3.14 1.4080 0 4 0 2 67.24 1.17 1.3924 0 4 1 2 67.53 4.62 1.3871 -2 4 1 2 67.96 5.83 1.3794 1 1 6 2 68.62 2.15 1.3677 0 2 6 2 70.20 3.14 1.3408 -4 2 8 2 76.63 2.07 1.2435 5 3 2 2 76.82 1.11 1.2409 -7 3 8 2 78.12 2.65 1.2234 -6 4 5 2 78.55 1.45 1.2178 -2 2 8 2 79.36 1.50 1.2074 0 4 4 2 80.87 1.04 1.1886 -6 4 1 2 81.34 2.82 1.1830 2 4 3 2 84.03 2.27 1.1518 7 3 1 2 84.20 1.27 1.1499 -1 3 7 2 85.67 1.48 1.1339 1 3 6 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.