Chkalovite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060682 Simonov M A, Egorov-Tismenko Y K, Belov N V Doklady Akademii Nauk SSSR 225 (1975) 1319-1322 Utochnennaya kristallicheskaya struktura chkalovita Na2Be[Si2O6] CELL PARAMETERS: 21.12900 6.881000 21.18800 90.00000 90.00000 90.00000 SPACE GROUP: Fdd2 X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 16.78 18.73 5.2889 0 0 4 22.06 100.00 4.0333 3 1 3 23.84 3.04 3.7355 4 0 4 25.09 2.28 3.5519 1 1 5 25.12 6.72 3.5464 5 1 1 26.67 3.17 3.3442 2 0 6 26.72 30.98 3.3381 6 0 2 27.29 41.12 3.2690 0 2 2 32.20 16.35 2.7803 2 2 4 32.22 23.76 2.7789 4 2 2 32.65 2.49 2.7432 1 1 7 32.71 3.88 2.7381 7 1 1 33.90 11.88 2.6445 0 0 8 34.85 6.05 2.5748 3 1 7 34.90 2.30 2.5712 7 1 3 36.07 79.76 2.4904 6 0 6 36.51 21.90 2.4613 0 2 6 36.55 18.27 2.4585 6 2 0 37.56 1.74 2.3947 6 2 2 38.92 1.32 2.3140 5 1 7 38.95 3.98 2.3125 7 1 5 40.44 3.92 2.2305 4 2 6 40.46 1.23 2.2294 6 2 4 42.71 3.09 2.1172 9 1 3 43.47 7.85 2.0817 3 3 3 43.63 2.58 2.0743 2 0 10 44.05 7.67 2.0558 2 2 8 44.11 7.91 2.0531 8 2 2 44.95 7.52 2.0167 6 2 6 45.20 2.78 2.0058 1 3 5 45.22 4.17 2.0048 5 3 1 46.12 1.04 1.9678 5 1 9 46.18 2.30 1.9656 9 1 5 46.62 1.23 1.9479 4 2 8 46.67 2.17 1.9461 8 2 4 49.39 3.54 1.8450 1 1 11 49.50 1.04 1.8412 11 1 1 50.14 2.59 1.8192 1 3 7 50.18 2.69 1.8177 7 3 1 50.69 20.20 1.8006 6 2 8 50.72 1.88 1.7997 8 2 6 51.53 1.20 1.7732 10 2 2 51.85 1.69 1.7630 0 0 12 51.98 3.59 1.7589 12 0 0 53.29 8.47 1.7186 0 4 0 53.82 6.25 1.7029 10 2 4 54.14 1.71 1.6936 11 1 5 54.76 2.81 1.6759 5 3 7 54.78 1.75 1.6753 7 3 5 54.89 1.35 1.6721 4 0 12 56.27 1.48 1.6345 0 4 4 57.01 1.56 1.6150 4 4 2 57.05 8.21 1.6138 9 1 9 57.67 1.59 1.5980 3 3 9 58.52 1.14 1.5767 11 1 7 59.68 2.65 1.5489 12 2 2 59.85 1.21 1.5449 3 1 13 60.58 5.30 1.5280 6 4 2 62.10 1.59 1.4942 10 0 10 62.39 3.54 1.4879 8 2 10 62.42 7.63 1.4872 10 2 8 62.63 1.58 1.4827 5 1 13 62.75 1.06 1.4803 13 1 5 63.50 1.22 1.4645 12 0 8 64.66 2.63 1.4410 0 4 8 65.08 8.06 1.4327 6 2 12 65.17 7.97 1.4310 12 2 6 65.33 1.14 1.4278 2 4 8 66.03 10.84 1.4145 6 4 6 67.33 2.64 1.3901 4 4 8 67.37 1.40 1.3896 11 3 5 67.37 2.37 1.3895 8 4 4 67.43 1.66 1.3884 6 0 14 67.71 2.55 1.3833 0 2 14 69.28 1.74 1.3557 3 1 15 69.95 1.73 1.3444 9 3 9 70.32 3.55 1.3381 4 2 14 70.46 3.99 1.3359 14 2 4 71.11 2.76 1.3253 3 5 3 71.21 1.01 1.3236 7 3 11 71.26 1.09 1.3228 11 3 7 71.30 1.82 1.3223 10 4 2 71.91 1.04 1.3124 9 1 13 75.00 1.37 1.2658 5 3 13 77.54 1.37 1.2306 0 4 12 77.64 3.27 1.2292 12 4 0 77.68 1.67 1.2287 10 0 14 77.75 1.33 1.2278 14 0 10 78.09 3.14 1.2233 16 2 2 78.23 1.42 1.2214 11 1 13 80.78 1.22 1.1891 15 1 9 81.21 2.63 1.1840 3 3 15 81.50 1.77 1.1805 16 0 8 82.32 1.36 1.1707 12 2 12 82.36 1.18 1.1703 3 5 9 83.11 1.28 1.1616 6 4 12 83.19 1.55 1.1607 12 4 6 86.21 1.14 1.1276 10 4 10 86.28 1.04 1.1269 14 4 2 87.40 1.09 1.1153 8 4 12 87.46 1.54 1.1147 12 4 8 87.71 1.70 1.1121 0 2 18 87.94 1.77 1.1098 18 2 0 90.00 4.47 1.0897 0 6 6 90.03 4.51 1.0894 6 6 0 90.03 4.51 1.0894 6 6 0 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.