Narsarsukite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060217 Peacor D R, Buerger M J American Mineralogist 47 (1962) 539-556 The determination and refinement of the structure of narsarsukite, Na2TiOSi4O10 CELL PARAMETERS: 10.72690 10.72690 7.947600 90.00000 90.00000 90.00000 SPACE GROUP: I4/m X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 11.72 7.57 7.5777 1 1 0 16.58 97.02 5.3583 2 0 0 21.68 23.32 4.1045 2 1 1 22.39 92.86 3.9752 0 0 2 23.51 38.76 3.7889 2 2 0 26.32 36.76 3.3889 1 3 0 26.32 43.26 3.3889 3 1 0 27.40 100.00 3.2584 3 0 1 27.97 44.70 3.1926 2 0 2 32.67 12.75 2.7426 2 2 2 33.47 8.45 2.6791 4 0 0 34.81 67.35 2.5789 1 3 2 34.89 5.63 2.5726 1 0 3 35.56 60.71 2.5259 3 3 0 36.38 1.31 2.4705 1 4 1 37.55 7.76 2.3963 2 4 0 37.55 1.59 2.3963 4 2 0 38.85 18.36 2.3192 2 1 3 40.62 5.92 2.2217 4 0 2 42.48 1.99 2.1284 3 0 3 43.05 6.43 2.1017 1 5 0 43.75 4.03 2.0694 3 4 1 44.14 11.65 2.0523 4 2 2 45.65 23.28 1.9876 0 0 4 45.88 22.66 1.9780 3 2 3 45.88 2.45 1.9780 2 3 3 47.08 5.97 1.9305 5 2 1 47.08 5.14 1.9305 2 5 1 47.29 10.18 1.9226 1 1 4 48.03 12.08 1.8944 4 4 0 48.88 4.27 1.8635 2 0 4 49.03 6.41 1.8580 1 5 2 49.61 1.81 1.8379 5 3 0 51.14 24.14 1.7861 6 0 0 53.26 1.67 1.7201 6 1 1 53.26 4.33 1.7201 1 6 1 53.44 2.57 1.7145 3 1 4 53.44 1.07 1.7145 1 3 4 53.59 4.61 1.7102 4 4 2 54.13 9.96 1.6944 2 6 0 55.05 1.83 1.6682 5 3 2 55.11 1.30 1.6665 3 4 3 55.11 1.20 1.6665 5 0 3 55.11 19.21 1.6665 4 3 3 56.48 5.20 1.6292 6 0 2 57.75 2.33 1.5963 4 0 4 57.95 3.86 1.5913 5 2 3 57.95 5.70 1.5913 2 5 3 58.97 5.21 1.5662 6 3 1 58.97 2.37 1.5662 3 6 1 59.14 7.21 1.5620 3 3 4 59.28 4.86 1.5587 6 2 2 59.28 2.01 1.5587 2 6 2 60.51 5.59 1.5298 2 4 4 61.14 6.46 1.5155 1 7 0 61.14 3.70 1.5155 5 5 0 61.43 5.09 1.5092 2 1 5 61.69 1.22 1.5033 7 0 1 62.49 6.59 1.4861 6 4 0 62.49 3.25 1.4861 4 6 0 63.39 1.43 1.4672 1 6 3 64.09 20.14 1.4527 3 0 5 64.52 1.00 1.4441 5 1 4 64.52 5.09 1.4441 1 5 4 65.95 1.27 1.4161 1 7 2 65.95 1.37 1.4161 5 5 2 66.01 5.76 1.4151 5 4 3 66.43 8.42 1.4072 7 3 0 66.43 4.29 1.4072 3 7 0 66.70 1.95 1.4021 3 2 5 67.24 13.63 1.3920 4 6 2 68.40 2.31 1.3713 4 4 4 68.58 1.05 1.3682 3 6 3 68.58 4.42 1.3682 6 3 3 69.67 1.14 1.3494 5 3 4 69.67 1.12 1.3494 3 5 4 70.92 5.89 1.3285 6 0 4 71.05 14.37 1.3265 7 3 2 71.05 1.37 1.3265 3 7 2 71.10 7.22 1.3256 7 0 3 71.13 1.02 1.3251 0 0 6 72.38 3.11 1.3053 1 1 6 72.75 2.25 1.2996 2 8 0 73.41 5.46 1.2895 2 6 4 74.25 2.41 1.2770 4 3 5 74.25 2.65 1.2770 3 4 5 75.21 2.63 1.2630 6 6 0 76.07 2.29 1.2508 2 2 6 76.44 5.04 1.2458 7 5 0 76.69 4.27 1.2422 5 2 5 76.69 5.76 1.2422 2 5 5 77.21 1.87 1.2352 2 8 2 79.51 2.65 1.2052 1 7 4 80.71 4.74 1.1902 6 4 4 80.83 1.39 1.1888 5 7 2 80.83 1.15 1.1888 7 5 2 80.88 1.99 1.1881 8 1 3 82.11 2.65 1.1734 3 3 6 83.30 1.25 1.1596 2 4 6 83.91 2.31 1.1528 5 4 5 84.29 1.39 1.1485 3 7 4 84.29 1.61 1.1485 7 3 4 85.60 2.22 1.1342 1 9 2 85.60 3.39 1.1342 9 1 2 86.03 3.71 1.1296 3 9 0 86.03 1.55 1.1296 9 3 0 86.28 6.61 1.1270 6 3 5 86.28 2.99 1.1270 3 6 5 86.87 1.17 1.1209 5 1 6 86.87 2.47 1.1209 1 5 6 88.65 4.47 1.1028 7 0 5 88.65 4.47 1.1028 7 0 5 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.