Bertrandite Hazen R M, Au A Y Physics and Chemistry of Minerals 13 (1986) 69-78 High-pressure crystal chemistry of phenakite (Be2SiO4) and bertrandite (Be4Si2O7(OH)2) Sample: P = 23 kbar Note: x-coordinate of O2 altered _database_code_amcsd 0007376 CELL PARAMETERS: 8.6410 15.0510 4.5338 90.000 90.000 90.000 SPACE GROUP: Cmc2_1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 589.646 Density (g/cm3): 2.660 MAX. ABS. INTENSITY / VOLUME**2: 6.520357882 RIR: 0.798 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.76 1.06 7.5255 0 2 0 2 11.81 20.33 7.4938 1 1 0 4 20.47 33.22 4.3387 1 3 0 4 20.56 99.17 4.3205 2 0 0 2 22.90 43.64 3.8835 0 2 1 2 22.93 8.61 3.8791 1 1 1 4 23.65 20.57 3.7627 0 4 0 2 28.47 100.00 3.1346 1 3 1 4 30.88 1.29 2.8955 0 4 1 2 30.96 10.99 2.8882 2 2 1 4 31.47 3.75 2.8427 1 5 0 4 31.53 4.51 2.8375 2 4 0 4 31.63 9.95 2.8290 3 1 0 4 35.80 20.91 2.5085 0 6 0 2 35.95 56.28 2.4979 3 3 0 4 37.34 1.14 2.4084 1 5 1 4 37.39 1.16 2.4053 2 4 1 4 37.47 8.75 2.4001 3 1 1 4 39.76 51.41 2.2669 0 0 2 1 41.12 21.02 2.1949 0 6 1 2 41.26 21.18 2.1878 3 3 1 4 41.62 2.15 2.1698 1 1 2 4 41.63 1.94 2.1694 2 6 0 4 41.82 6.60 2.1602 4 0 0 2 43.49 4.23 2.0811 3 5 0 4 45.13 1.73 2.0092 1 3 2 4 45.17 6.65 2.0074 2 0 2 2 46.40 15.17 1.9569 2 6 1 4 46.78 6.77 1.9417 0 4 2 2 48.00 2.69 1.8954 1 7 1 4 48.11 1.31 1.8914 3 5 1 4 48.38 1.76 1.8814 0 8 0 2 51.57 2.44 1.7723 1 5 2 4 51.61 3.10 1.7711 2 4 2 4 51.67 4.43 1.7690 3 1 2 4 52.67 1.51 1.7377 0 8 1 2 53.36 1.05 1.7169 5 1 0 4 54.56 7.21 1.6819 0 6 2 2 54.68 10.20 1.6787 3 3 2 4 56.01 2.17 1.6419 1 9 0 4 56.19 1.13 1.6369 4 6 0 4 56.30 8.79 1.6340 5 3 0 4 57.19 4.22 1.6106 3 7 1 4 57.39 1.00 1.6056 5 1 1 4 58.93 1.48 1.5673 2 6 2 4 59.07 4.14 1.5639 4 0 2 2 59.92 4.69 1.5438 1 9 1 4 60.09 9.33 1.5396 4 6 1 4 60.20 6.54 1.5372 5 3 1 4 60.38 5.20 1.5330 3 5 2 4 62.70 3.23 1.4817 0 2 3 2 64.35 1.84 1.4477 0 8 2 2 64.42 16.24 1.4462 3 9 0 4 64.73 6.73 1.4402 6 0 0 2 65.33 1.07 1.4284 0 10 1 2 65.39 6.62 1.4272 1 3 3 4 66.74 1.49 1.4016 2 2 3 4 69.63 2.86 1.3503 6 2 1 4 69.94 1.31 1.3450 6 4 0 4 70.67 2.48 1.3330 3 1 3 4 71.13 2.93 1.3255 5 3 2 4 73.10 8.83 1.2945 0 6 3 2 73.20 8.11 1.2930 3 3 3 4 73.32 1.37 1.2912 5 7 1 4 75.85 2.19 1.2542 0 12 0 2 76.14 1.51 1.2502 5 5 2 4 76.23 2.41 1.2490 6 6 0 4 76.88 8.24 1.2400 2 6 3 4 78.44 7.65 1.2192 3 9 2 4 78.72 4.93 1.2156 6 0 2 2 79.59 6.05 1.2045 2 12 0 4 79.62 3.26 1.2041 6 6 1 4 79.80 3.78 1.2018 5 9 0 4 80.56 1.82 1.1924 3 11 1 4 82.94 1.91 1.1641 2 12 1 4 83.16 3.54 1.1617 5 9 1 4 83.40 6.12 1.1589 7 3 1 4 83.59 1.98 1.1567 6 4 2 4 85.46 2.40 1.1362 3 7 3 4 88.03 5.90 1.1095 5 3 3 4 89.36 1.14 1.0964 2 0 4 2 89.62 2.35 1.0939 6 6 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.