Nepheline Gatta G D, Angel R J American Mineralogist 92 (2007) 1446-1455 Elastic behavior and pressure-induced structural evolution of nepheline: Implications for the nature of the modulated superstructure Locality: intrusive aplite of Snipe River, Tambani, Nyasaland, Malawi Sample: P = 7.462 GPa _database_code_amcsd 0004427 CELL PARAMETERS: 9.5587 9.5587 8.1051 90.000 90.000 120.000 SPACE GROUP: P6_3 X-RAY WAVELENGTH: 1.541838 Cell Volume: 641.337 Density (g/cm3): 2.967 MAX. ABS. INTENSITY / VOLUME**2: 6.677621512 RIR: 0.733 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.56 11.09 4.7793 1 1 0 6 21.47 11.24 4.1390 2 0 0 6 21.59 14.16 4.1169 1 1 1 6 21.93 53.47 4.0525 0 0 2 1 24.14 72.17 3.6862 2 0 1 6 24.46 9.12 3.6398 1 0 2 6 28.53 2.78 3.1288 1 2 0 6 28.53 58.66 3.1288 2 1 0 6 30.63 12.08 2.9189 1 2 1 6 30.63 1.87 2.9189 2 1 1 6 30.88 100.00 2.8957 2 0 2 6 32.45 79.79 2.7594 3 0 0 6 34.33 1.67 2.6121 3 0 1 6 34.93 6.28 2.5684 1 0 3 6 36.27 4.76 2.4766 1 2 2 6 36.27 41.24 2.4766 2 1 2 6 37.64 12.37 2.3897 2 2 0 6 38.27 7.57 2.3519 1 1 3 6 39.24 10.76 2.2959 1 3 0 6 39.24 8.38 2.2959 3 1 0 6 39.31 4.55 2.2921 2 2 1 6 39.51 2.03 2.2808 3 0 2 6 39.85 59.87 2.2624 2 0 3 6 40.85 19.82 2.2090 1 3 1 6 40.85 15.54 2.2090 3 1 1 6 43.74 6.53 2.0695 4 0 0 6 43.99 2.85 2.0584 2 2 2 6 44.30 6.09 2.0449 1 2 3 6 44.30 5.62 2.0449 2 1 3 6 44.72 11.80 2.0263 0 0 4 1 45.22 2.55 2.0052 4 0 1 6 45.40 3.77 1.9976 3 1 2 6 45.40 8.39 1.9976 1 3 2 6 46.12 3.66 1.9682 1 0 4 6 47.07 3.39 1.9305 3 0 3 6 47.90 3.03 1.8991 3 2 0 6 48.82 2.70 1.8655 1 1 4 6 49.28 7.33 1.8490 2 3 1 6 49.28 3.40 1.8490 3 2 1 6 49.45 6.58 1.8431 4 0 2 6 50.12 8.91 1.8199 2 0 4 6 50.52 1.59 1.8064 1 4 0 6 50.52 2.87 1.8064 4 1 0 6 51.86 6.02 1.7632 1 4 1 6 51.86 2.93 1.7632 4 1 1 6 52.29 1.54 1.7495 3 1 3 6 52.29 1.81 1.7495 1 3 3 6 53.27 1.35 1.7197 2 3 2 6 53.27 8.69 1.7197 3 2 2 6 55.50 2.09 1.6556 5 0 0 6 55.71 1.21 1.6499 1 4 2 6 55.97 1.33 1.6429 4 0 3 6 56.33 3.20 1.6332 3 0 4 6 56.75 4.22 1.6221 5 0 1 6 59.05 4.12 1.5644 2 4 0 6 59.05 3.12 1.5644 4 2 0 6 59.50 13.77 1.5537 2 3 3 6 59.50 9.97 1.5537 3 2 3 6 59.84 1.10 1.5455 2 2 4 6 60.25 3.92 1.5361 2 4 1 6 60.25 1.49 1.5361 4 2 1 6 60.29 4.03 1.5351 1 1 5 6 60.40 9.08 1.5326 5 0 2 6 61.43 13.55 1.5094 2 0 5 6 61.78 4.89 1.5017 4 1 3 6 62.47 4.68 1.4868 1 5 0 6 63.77 9.48 1.4594 2 4 2 6 64.77 3.50 1.4393 1 2 5 6 66.20 14.48 1.4116 5 0 3 6 67.05 1.54 1.3958 1 5 2 6 67.61 1.01 1.3857 2 3 4 6 68.36 10.10 1.3723 3 3 3 6 69.42 4.25 1.3538 2 4 3 6 69.60 5.94 1.3508 0 0 6 1 69.74 1.41 1.3484 1 4 4 6 70.12 1.05 1.3421 4 3 1 6 70.65 1.27 1.3332 1 0 6 6 71.12 18.11 1.3256 2 5 0 6 71.12 7.89 1.3256 5 2 0 6 71.21 3.71 1.3242 3 1 5 6 71.21 5.40 1.3242 1 3 5 6 72.75 2.32 1.2999 1 1 6 6 73.39 5.44 1.2901 3 4 2 6 74.33 1.83 1.2761 4 0 5 6 75.45 5.11 1.2599 2 5 2 6 77.40 5.16 1.2329 3 2 5 6 77.40 5.15 1.2329 2 3 5 6 77.72 2.06 1.2287 6 0 3 6 78.73 2.94 1.2154 4 3 3 6 78.90 5.76 1.2133 3 0 6 6 79.53 2.04 1.2053 6 1 2 6 81.92 2.02 1.1760 2 2 6 6 82.42 1.06 1.1702 7 0 1 6 82.93 2.32 1.1643 1 3 6 6 83.45 5.46 1.1583 5 0 5 6 85.06 2.91 1.1404 6 0 4 6 85.54 7.06 1.1352 7 0 2 6 85.92 2.27 1.1312 4 0 6 6 86.45 2.31 1.1257 2 4 5 6 86.45 1.20 1.1257 4 2 5 6 88.05 1.73 1.1093 2 5 4 6 89.74 2.34 1.0927 4 4 3 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.