Nepheline Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R040025 Tait K T, Sokolova E V, Hawthorne F C, Khomyakov A P The Canadian Mineralogist 41 (2003) 61-70 The crystal chemistry of nepheline Note: sample 2 Locality: Bancroft, Ontario, Canada CELL PARAMETERS: 10.0011 10.0011 8.3855 90.000 90.000 120.000 SPACE GROUP: P6_3 ATOM X Y Z OCCUPANCY ISO(B) K 0.00000 0.00000 0.01170 0.800 1.903 Ca 0.00000 0.00000 0.01170 0.040 1.903 Na 0.99813 0.55455 0.51740 1.000 1.857 Al 0.66667 0.33333 0.21140 0.970 0.940 Si 0.66667 0.33333 0.21140 0.030 0.940 Si 0.33333 0.66667 0.32250 1.000 0.932 Si 0.75966 0.66575 0.33220 1.000 0.892 Al 0.09294 0.76047 0.20560 0.940 0.830 Si 0.09294 0.76047 0.20560 0.060 0.830 O 0.37200 0.69400 0.50910 0.333 2.763 O 0.71056 0.68338 0.51210 1.000 1.919 O 0.17310 0.64970 0.26210 1.000 2.479 O 0.65160 0.48890 0.27590 1.000 2.077 O 0.93990 0.71370 0.33280 1.000 1.113 O 0.73410 0.77640 0.21110 1.000 1.484 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 7 +/- 7 +/- 7 MAX. ABS. INTENSITY / VOLUME**2: 8.240393619 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 17.74 3.72 5.0005 1 1 0 20.51 12.56 4.3306 2 0 0 20.68 7.45 4.2949 1 1 1 21.19 44.98 4.1927 0 0 2 23.12 75.05 3.8478 2 0 1 23.57 6.26 3.7738 1 0 2 27.24 38.48 3.2736 1 2 0 27.24 11.84 3.2736 2 1 0 29.29 1.50 3.0495 1 2 1 29.29 9.21 3.0495 2 1 1 29.66 100.00 3.0123 2 0 2 30.97 46.20 2.8871 3 0 0 33.69 1.06 2.6601 1 0 3 34.77 22.25 2.5803 1 2 2 34.77 2.76 2.5803 2 1 2 35.92 17.34 2.5003 2 2 0 36.84 1.93 2.4399 1 1 3 37.44 2.15 2.4022 1 3 0 37.44 11.42 2.4022 3 1 0 37.54 2.46 2.3960 2 2 1 37.84 2.35 2.3779 3 0 2 38.33 42.16 2.3485 2 0 3 39.00 15.62 2.3093 1 3 1 39.00 9.32 2.3093 3 1 1 41.71 4.60 2.1653 4 0 0 42.08 1.48 2.1474 2 2 2 42.53 3.26 2.1257 1 2 3 42.53 4.43 2.1257 2 1 3 43.15 1.14 2.0965 4 0 1 43.15 13.22 2.0964 0 0 4 43.41 1.45 2.0843 3 1 2 43.41 4.42 2.0843 1 3 2 45.66 2.79 1.9870 2 3 0 47.00 1.72 1.9335 2 3 1 47.00 8.19 1.9335 3 2 1 47.24 5.16 1.9239 4 0 2 48.14 3.25 1.8900 1 4 0 48.23 4.51 1.8869 2 0 4 49.43 2.07 1.8438 4 1 1 50.85 7.28 1.7956 2 3 2 51.78 1.29 1.7654 2 1 4 52.85 1.26 1.7322 5 0 0 53.16 1.09 1.7231 1 4 2 53.53 2.97 1.7118 4 0 3 54.06 5.58 1.6964 5 0 1 54.06 1.92 1.6963 3 0 4 56.20 3.04 1.6368 2 4 0 56.20 2.19 1.6368 4 2 0 56.85 1.87 1.6195 2 3 3 56.85 9.37 1.6195 3 2 3 57.35 1.79 1.6065 4 2 1 57.57 6.22 1.6010 5 0 2 58.00 1.09 1.5901 1 1 5 58.43 1.22 1.5795 1 3 4 58.99 5.69 1.5657 1 4 3 58.99 3.01 1.5657 4 1 3 59.07 15.65 1.5639 2 0 5 59.42 2.91 1.5556 5 1 0 59.70 2.11 1.5489 3 3 2 60.53 1.30 1.5295 5 1 1 60.74 4.28 1.5247 4 2 2 61.57 1.29 1.5061 4 0 4 63.14 6.94 1.4724 5 0 3 63.82 2.58 1.4585 5 1 2 64.63 1.11 1.4421 3 2 4 65.16 10.04 1.4316 3 3 3 66.95 3.32 1.3976 0 0 6 67.54 6.23 1.3869 2 5 0 67.54 14.17 1.3869 5 2 0 68.20 4.24 1.3751 1 3 5 68.20 2.27 1.3751 3 1 5 69.75 1.38 1.3483 3 4 2 69.75 1.04 1.3483 4 3 2 71.10 1.35 1.3259 4 0 5 71.67 4.31 1.3167 5 2 2 73.96 1.58 1.2816 2 3 5 73.96 6.43 1.2816 3 2 5 74.83 2.94 1.2688 3 4 3 75.59 3.61 1.2579 3 0 6 78.39 3.46 1.2199 2 2 6 79.31 1.10 1.2080 1 3 6 79.31 2.05 1.2080 3 1 6 79.56 5.59 1.2049 5 0 5 80.84 1.45 1.1889 6 0 4 81.03 5.90 1.1867 7 0 2 83.59 1.16 1.1567 5 2 4 84.99 1.15 1.1412 4 4 3 85.05 1.09 1.1405 5 1 5 85.90 3.26 1.1314 7 0 3 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.