Davidsmithite Rossi G, Oberti R, Smith D C European Journal of Mineralogy 1 (1989) 59-70 The crystal structure of a K-poor Ca-rich silicate with the nepheline framework, and crystal-chemical relationships in the compositional space (K,Na,Ca,_)8(Al,Si)16O32 Sample: G201b7 _database_code_amcsd 0006340 CELL PARAMETERS: 9.9820 9.9820 8.3640 90.000 90.000 120.000 SPACE GROUP: P6_3 X-RAY WAVELENGTH: 1.541838 Cell Volume: 721.738 Density (g/cm3): 2.614 MAX. ABS. INTENSITY / VOLUME**2: 6.215412657 RIR: 0.774 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.23 3.42 8.6447 1 0 0 6 14.74 1.01 6.0110 1 0 1 6 17.77 10.34 4.9910 1 1 0 6 20.55 24.54 4.3223 2 0 0 6 20.72 9.63 4.2859 1 1 1 6 21.25 76.44 4.1820 0 0 2 1 23.16 97.30 3.8399 2 0 1 6 23.63 2.00 3.7646 1 0 2 6 27.29 11.81 3.2674 1 2 0 6 27.29 55.56 3.2674 2 1 0 6 27.83 1.78 3.2055 1 1 2 6 29.35 12.53 3.0434 1 2 1 6 29.35 1.84 3.0434 2 1 1 6 29.73 100.00 3.0055 2 0 2 6 31.04 49.23 2.8816 3 0 0 6 34.85 9.43 2.5747 1 2 2 6 34.85 17.10 2.5747 2 1 2 6 35.99 18.75 2.4955 2 2 0 6 36.93 2.71 2.4340 1 1 3 6 37.51 1.19 2.3976 3 1 0 6 37.51 11.24 2.3976 1 3 0 6 37.61 3.05 2.3913 2 2 1 6 37.92 1.14 2.3728 3 0 2 6 38.42 53.19 2.3429 2 0 3 6 39.08 10.52 2.3048 1 3 1 6 39.08 20.58 2.3048 3 1 1 6 41.80 3.82 2.1612 4 0 0 6 42.63 4.77 2.1208 1 2 3 6 42.63 3.12 2.1208 2 1 3 6 43.24 1.17 2.0924 4 0 1 6 43.27 13.20 2.0910 0 0 4 1 43.51 9.59 2.0800 3 1 2 6 43.51 4.69 2.0800 1 3 2 6 44.58 2.99 2.0324 1 0 4 6 45.75 4.87 1.9832 3 2 0 6 47.09 9.49 1.9297 2 3 1 6 47.09 1.42 1.9297 3 2 1 6 47.35 3.14 1.9199 4 0 2 6 48.24 2.88 1.8864 4 1 0 6 48.35 2.72 1.8823 2 0 4 6 49.53 2.49 1.8402 1 4 1 6 50.96 5.47 1.7919 3 2 2 6 51.92 2.31 1.7612 2 1 4 6 52.96 2.17 1.7289 5 0 0 6 53.27 2.79 1.7196 4 1 2 6 53.66 4.46 1.7081 4 0 3 6 54.17 6.72 1.6931 5 0 1 6 55.21 1.27 1.6637 3 3 0 6 56.31 3.01 1.6337 2 4 0 6 56.31 2.86 1.6337 4 2 0 6 56.98 3.03 1.6161 3 2 3 6 56.98 11.04 1.6161 2 3 3 6 57.48 1.77 1.6034 2 4 1 6 57.70 5.67 1.5978 5 0 2 6 59.13 4.08 1.5624 1 4 3 6 59.13 6.36 1.5624 4 1 3 6 59.23 18.15 1.5600 2 0 5 6 59.54 3.97 1.5526 1 5 0 6 59.83 1.05 1.5458 3 3 2 6 60.66 1.79 1.5265 1 5 1 6 60.66 1.32 1.5265 5 1 1 6 60.88 3.30 1.5217 2 4 2 6 62.36 1.06 1.4890 1 2 5 6 63.29 8.56 1.4693 5 0 3 6 63.96 1.98 1.4556 1 5 2 6 63.96 1.57 1.4556 5 1 2 6 65.32 12.44 1.4286 3 3 3 6 67.15 3.48 1.3940 0 0 6 1 67.69 14.80 1.3843 2 5 0 6 67.69 6.19 1.3843 5 2 0 6 68.38 2.38 1.3719 1 3 5 6 68.38 5.23 1.3719 3 1 5 6 70.09 1.01 1.3426 1 1 6 6 71.29 1.52 1.3228 4 0 5 6 71.84 5.57 1.3141 2 5 2 6 71.84 1.44 1.3141 5 2 2 6 74.16 1.38 1.2787 3 2 5 6 74.16 6.98 1.2787 2 3 5 6 75.01 3.36 1.2662 4 3 3 6 75.81 2.80 1.2549 3 0 6 6 78.61 3.27 1.2170 2 2 6 6 79.54 1.52 1.2051 1 3 6 6 79.54 1.86 1.2051 3 1 6 6 79.77 6.32 1.2022 5 0 5 6 81.22 5.13 1.1844 7 0 2 6 81.62 1.01 1.1796 3 3 5 6 85.20 1.16 1.1389 4 4 3 6 85.29 1.28 1.1380 1 5 5 6 86.12 3.84 1.1291 7 0 3 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.