Chevkinite-(Nd) Calvo C, Faggiani R American Mineralogist 59 (1974) 1277-1285 A re-investigation of the crystal structures of chevkinite and perrierite Coordinates to O8 revised by Dr. Zhuming Yang, December 2001 Locality: natural, but location not given _database_code_amcsd 0000433 CELL PARAMETERS: 13.3280 5.7270 10.9710 90.000 100.910 90.000 SPACE GROUP: P2_1/a X-RAY WAVELENGTH: 1.541838 Cell Volume: 822.275 Density (g/cm3): 4.981 MAX. ABS. INTENSITY / VOLUME**2: 21.51972633 RIR: 1.407 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 8.21 11.36 10.7727 0 0 1 2 13.53 3.61 6.5436 2 0 0 2 16.46 84.45 5.3864 0 0 2 2 16.90 8.03 5.2466 1 1 0 4 18.24 92.07 4.8645 -1 1 1 4 19.26 2.57 4.6086 -2 0 2 2 19.37 66.63 4.5821 1 1 1 4 20.61 5.69 4.3096 2 1 0 4 21.23 1.40 4.1852 -2 1 1 4 22.75 1.82 3.9095 -1 1 2 4 23.17 3.58 3.8396 2 1 1 4 23.29 1.26 3.8191 2 0 2 2 24.79 28.05 3.5909 0 0 3 2 24.80 6.76 3.5904 -2 1 2 4 25.67 34.26 3.4703 3 1 0 4 25.76 51.13 3.4586 -3 1 1 4 27.26 2.18 3.2718 4 0 0 2 28.08 2.72 3.1774 2 1 2 4 28.18 87.77 3.1669 3 1 1 4 28.42 68.27 3.1405 -3 1 2 4 29.05 26.50 3.0740 -1 1 3 4 29.13 34.75 3.0656 -4 0 2 2 30.01 49.72 2.9778 4 0 1 2 30.58 2.20 2.9233 2 0 3 2 31.23 33.84 2.8638 1 1 3 4 31.24 66.16 2.8635 0 2 0 2 31.49 1.77 2.8409 4 1 0 4 32.35 5.78 2.7674 0 2 1 4 32.73 61.98 2.7357 3 1 2 4 32.75 4.83 2.7346 -1 2 1 4 33.09 90.34 2.7074 -3 1 3 4 33.27 61.80 2.6932 0 0 4 2 33.38 20.11 2.6846 -4 0 3 2 33.42 5.78 2.6813 1 2 1 4 34.18 4.22 2.6233 2 2 0 4 34.44 2.05 2.6037 2 1 3 4 34.57 6.76 2.5945 -2 2 1 4 34.67 8.38 2.5875 4 0 2 2 35.50 39.92 2.5284 0 2 2 4 35.84 7.32 2.5055 2 2 1 4 37.09 2.41 2.4237 -2 1 4 4 37.25 1.55 2.4137 -5 1 1 4 37.79 4.71 2.3806 5 1 0 4 38.17 1.17 2.3580 4 1 2 4 38.63 1.42 2.3308 -5 1 2 4 38.70 11.93 2.3265 3 1 3 4 38.72 4.81 2.3253 1 1 4 4 39.09 14.15 2.3043 -4 0 4 2 39.13 5.14 2.3021 -3 1 4 4 40.05 6.02 2.2514 -1 2 3 4 40.18 1.11 2.2445 5 1 1 4 40.28 14.22 2.2388 0 2 3 4 40.62 7.99 2.2211 -6 0 1 2 40.67 17.77 2.2184 4 0 3 2 41.63 5.52 2.1696 -6 0 2 2 41.71 34.86 2.1655 -4 2 1 4 41.73 3.51 2.1647 1 2 3 4 41.93 25.64 2.1548 4 2 0 4 43.23 12.12 2.0926 -4 2 2 4 43.71 3.78 2.0708 -6 1 1 4 43.86 15.97 2.0640 4 2 1 4 43.88 11.30 2.0632 6 0 1 2 44.16 3.91 2.0508 5 1 2 4 44.22 4.84 2.0484 -1 1 5 4 44.28 2.98 2.0456 2 2 3 4 44.32 8.88 2.0437 -6 0 3 2 45.64 25.67 1.9876 3 1 4 4 46.12 30.50 1.9680 -3 1 5 4 46.28 49.96 1.9618 0 2 4 4 46.35 1.59 1.9588 -5 1 4 4 46.36 6.12 1.9585 -4 2 3 4 46.45 10.86 1.9548 -2 2 4 4 46.59 1.17 1.9495 -5 2 1 4 46.78 12.37 1.9419 1 1 5 4 46.82 1.70 1.9403 2 0 5 2 47.04 4.37 1.9319 5 2 0 4 47.35 3.81 1.9198 4 2 2 4 47.74 2.91 1.9051 -5 2 2 4 48.71 3.88 1.8693 -1 3 1 4 49.20 4.62 1.8520 1 3 1 4 49.75 8.45 1.8326 2 3 0 4 50.04 1.47 1.8227 -2 3 1 4 50.07 2.29 1.8217 -2 0 6 2 50.37 8.72 1.8117 2 2 4 4 50.86 3.84 1.7955 0 0 6 2 50.86 6.85 1.7952 -4 2 4 4 50.99 2.82 1.7910 2 3 1 4 51.14 24.12 1.7861 -7 1 2 4 51.41 18.36 1.7773 7 1 0 4 51.84 6.54 1.7637 -2 3 2 4 52.11 5.55 1.7550 -6 2 1 4 52.16 6.54 1.7537 4 2 3 4 52.31 3.43 1.7489 3 3 0 4 52.36 5.52 1.7474 -3 3 1 4 52.51 2.45 1.7428 5 2 2 4 52.56 3.14 1.7413 -1 2 5 4 52.76 4.38 1.7351 6 2 0 4 52.91 3.14 1.7306 -2 2 5 4 52.95 9.99 1.7293 -6 2 2 4 53.09 5.58 1.7250 6 0 3 2 53.20 4.53 1.7216 0 2 5 4 53.23 1.74 1.7207 -7 1 3 4 53.32 2.57 1.7182 3 1 5 4 53.36 12.73 1.7170 -4 0 6 2 53.68 2.50 1.7076 2 3 2 4 53.73 12.04 1.7059 3 3 1 4 53.84 1.49 1.7027 -3 1 6 4 53.85 7.93 1.7024 -6 0 5 2 53.87 8.94 1.7018 -3 3 2 4 54.25 2.52 1.6909 -1 3 3 4 54.84 13.10 1.6739 6 2 1 4 55.17 13.23 1.6648 -8 0 1 2 55.22 9.44 1.6635 -6 2 3 4 55.31 10.60 1.6608 4 0 5 2 55.32 3.17 1.6606 1 1 6 4 55.53 3.62 1.6548 -8 0 2 2 55.59 3.81 1.6533 1 3 3 4 55.77 9.24 1.6484 5 1 4 4 56.51 1.81 1.6284 -4 2 5 4 56.55 10.12 1.6275 3 3 2 4 56.69 12.01 1.6238 -7 1 4 4 56.78 12.85 1.6215 -3 3 3 4 56.81 1.05 1.6205 -4 3 2 4 57.30 2.72 1.6079 -8 0 3 2 57.45 10.93 1.6041 7 1 2 4 57.67 2.58 1.5984 2 3 3 4 58.06 2.21 1.5887 4 2 4 4 58.27 1.75 1.5834 6 2 2 4 58.66 2.01 1.5737 8 0 1 2 58.85 1.38 1.5692 -5 1 6 4 59.49 3.63 1.5539 -2 3 4 4 59.98 1.10 1.5424 5 3 0 4 60.12 7.33 1.5390 0 0 7 2 60.24 2.00 1.5362 -6 0 6 2 60.63 1.65 1.5274 3 3 3 4 60.64 1.07 1.5270 1 3 4 4 60.90 7.93 1.5212 0 2 6 4 60.94 1.58 1.5204 -3 3 4 4 61.36 1.29 1.5109 -7 1 5 4 61.49 3.47 1.5080 -1 1 7 4 61.63 7.48 1.5049 3 1 6 4 62.20 15.96 1.4926 -3 1 7 4 62.37 2.53 1.4889 8 0 2 2 62.83 1.05 1.4791 2 3 4 4 63.01 1.06 1.4752 5 2 4 4 63.14 4.52 1.4726 -4 2 6 4 63.66 1.14 1.4617 4 0 6 2 64.35 1.46 1.4478 -6 3 1 4 64.37 1.99 1.4474 1 1 7 4 64.69 3.65 1.4408 -8 0 5 2 64.74 1.06 1.4400 -1 3 5 4 64.78 2.65 1.4392 -8 2 1 4 64.91 4.85 1.4367 4 2 5 4 65.15 3.28 1.4319 2 2 6 4 65.16 14.34 1.4318 0 4 0 2 65.85 5.41 1.4184 3 3 4 4 66.04 2.81 1.4148 -1 4 1 4 66.22 6.69 1.4113 -3 3 5 4 66.44 2.76 1.4072 1 4 1 4 66.52 1.64 1.4056 6 0 5 2 66.70 1.00 1.4024 -9 1 3 4 66.72 4.19 1.4020 -8 2 3 4 66.74 2.37 1.4015 1 3 5 4 66.76 2.07 1.4012 6 3 1 4 67.09 2.04 1.3951 -6 3 3 4 67.11 5.25 1.3948 -7 1 6 4 67.23 2.76 1.3926 8 0 3 2 67.52 1.45 1.3872 -6 0 7 2 67.72 1.20 1.3837 0 4 2 4 67.97 4.54 1.3792 8 2 1 4 68.26 6.10 1.3741 7 1 4 4 68.61 2.36 1.3679 6 2 4 4 69.32 2.73 1.3556 0 2 7 4 69.35 2.41 1.3550 -9 1 4 4 69.43 6.99 1.3537 -6 2 6 4 69.85 5.70 1.3466 0 0 8 2 70.28 5.96 1.3394 -7 3 2 4 70.50 3.80 1.3357 7 3 0 4 70.69 1.53 1.3325 -1 4 3 4 70.85 1.24 1.3299 0 4 3 4 70.87 1.85 1.3296 -10 0 1 2 70.92 1.19 1.3288 -1 1 8 4 71.41 4.33 1.3210 8 2 2 4 71.60 1.56 1.3179 -2 3 6 4 71.85 1.94 1.3139 1 4 3 4 71.97 1.52 1.3121 -10 0 3 2 72.18 1.22 1.3087 10 0 0 2 72.68 1.42 1.3010 4 0 7 2 72.92 2.72 1.2972 -4 4 2 4 73.38 3.45 1.2903 4 4 1 4 73.59 4.44 1.2871 -8 2 5 4 73.85 1.01 1.2833 -7 1 7 4 73.99 2.41 1.2811 1 1 8 4 74.08 1.67 1.2799 6 3 3 4 74.18 2.69 1.2783 5 3 4 4 74.70 1.63 1.2707 10 0 1 2 74.97 3.00 1.2667 -7 3 4 4 75.15 7.04 1.2642 0 4 4 4 75.21 1.57 1.2633 -4 4 3 4 75.32 7.09 1.2618 6 2 5 4 75.63 3.46 1.2573 7 3 2 4 75.72 1.82 1.2561 5 4 0 4 75.82 1.16 1.2547 -8 3 1 4 75.88 1.05 1.2538 -9 2 4 4 75.96 1.24 1.2528 4 4 2 4 75.99 2.31 1.2523 8 2 3 4 76.26 1.79 1.2486 -5 4 2 4 76.27 5.93 1.2484 -6 2 7 4 77.91 1.31 1.2262 -10 0 5 2 78.33 1.19 1.2207 -5 4 3 4 78.49 3.96 1.2186 0 2 8 4 78.82 1.28 1.2143 8 3 1 4 79.01 1.56 1.2118 -4 2 8 4 79.20 1.18 1.2094 -1 3 7 4 79.33 2.26 1.2078 3 3 6 4 79.47 4.40 1.2060 -10 2 1 4 79.68 1.73 1.2034 -6 4 1 4 79.71 1.30 1.2030 4 4 3 4 79.83 5.03 1.2014 -3 3 7 4 79.99 1.89 1.1994 5 4 2 4 80.03 1.97 1.1989 -1 4 5 4 80.26 4.95 1.1961 3 1 8 4 80.92 6.40 1.1880 -3 1 9 4 81.05 1.06 1.1864 3 4 4 4 81.18 2.34 1.1848 -11 1 2 4 81.21 4.74 1.1845 4 2 7 4 81.44 4.88 1.1818 -11 1 1 4 81.55 4.32 1.1804 -7 1 8 4 81.57 1.56 1.1802 -5 4 4 4 81.80 1.11 1.1775 1 3 7 4 81.88 1.17 1.1765 1 4 5 4 81.90 1.69 1.1763 6 4 1 4 82.12 2.46 1.1737 -11 1 3 4 82.21 1.38 1.1726 -6 4 3 4 83.05 3.14 1.1628 7 1 6 4 84.19 1.20 1.1500 -8 3 5 4 84.23 2.54 1.1496 -11 1 4 4 84.29 1.09 1.1489 2 3 7 4 84.31 1.53 1.1486 -7 3 6 4 84.97 1.25 1.1415 -8 2 7 4 85.38 2.78 1.1370 7 3 4 4 85.49 2.77 1.1358 11 1 1 4 85.86 1.03 1.1319 6 3 5 4 85.96 1.36 1.1308 -5 4 5 4 86.20 2.13 1.1282 2 5 0 4 86.30 4.32 1.1272 -10 2 5 4 86.40 1.18 1.1261 -9 3 4 4 86.78 3.43 1.1223 10 2 2 4 87.16 1.11 1.1183 2 5 1 4 87.51 1.85 1.1148 -11 1 5 4 87.82 2.60 1.1116 -2 5 2 4 88.06 3.19 1.1092 8 0 6 2 88.42 2.19 1.1056 -10 0 7 2 88.44 2.07 1.1054 8 2 5 4 88.54 1.70 1.1044 0 2 9 4 88.81 1.03 1.1017 6 4 3 4 88.91 1.60 1.1007 5 4 4 4 89.03 3.32 1.0996 -4 4 6 4 89.17 1.20 1.0982 10 0 4 2 89.28 1.48 1.0971 2 5 2 4 89.43 2.21 1.0957 -6 4 5 4 89.44 1.34 1.0956 -3 5 2 4 89.59 1.57 1.0941 5 1 8 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.