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 = 1 bar _database_code_amcsd 0007375 CELL PARAMETERS: 8.7135 15.2680 4.5683 90.000 90.000 90.000 SPACE GROUP: Cmc2_1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 607.756 Density (g/cm3): 2.581 MAX. ABS. INTENSITY / VOLUME**2: 6.750702901 RIR: 0.852 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.69 19.68 7.5678 1 1 0 4 20.21 36.97 4.3946 1 3 0 4 20.38 100.00 4.3568 2 0 0 2 22.68 39.92 3.9200 0 2 1 2 22.74 8.02 3.9110 1 1 1 4 23.30 18.12 3.8170 0 4 0 2 28.18 99.86 3.1671 1 3 1 4 30.52 1.00 2.9291 0 4 1 2 30.68 11.33 2.9141 2 2 1 4 31.03 3.20 2.8818 1 5 0 4 31.15 4.52 2.8710 2 4 0 4 31.35 9.04 2.8533 3 1 0 4 35.27 20.21 2.5447 0 6 0 2 35.59 48.51 2.5226 3 3 0 4 36.88 1.26 2.4373 1 5 1 4 37.15 8.33 2.4201 3 1 1 4 39.45 45.49 2.2841 0 0 2 1 40.58 23.78 2.2230 0 6 1 2 40.86 22.95 2.2083 3 3 1 4 41.08 2.23 2.1973 2 6 0 4 41.29 1.41 2.1867 1 1 2 4 41.45 8.42 2.1784 4 0 0 2 42.98 4.11 2.1045 3 5 0 4 44.71 2.08 2.0267 1 3 2 4 44.80 5.99 2.0230 2 0 2 2 45.82 20.18 1.9802 2 6 1 4 46.32 4.90 1.9600 0 4 2 2 47.35 2.49 1.9199 1 7 1 4 47.57 1.62 1.9114 3 5 1 4 47.65 2.04 1.9085 0 8 0 2 51.02 1.45 1.7900 1 5 2 4 51.10 1.69 1.7875 2 4 2 4 51.23 3.91 1.7832 3 1 2 4 51.92 1.15 1.7610 0 8 1 2 53.94 7.25 1.6998 0 6 2 2 54.17 7.98 1.6932 3 3 2 4 55.16 3.09 1.6652 1 9 0 4 55.53 1.44 1.6548 4 6 0 4 55.76 9.76 1.6487 5 3 0 4 56.48 4.17 1.6294 3 7 1 4 56.87 1.29 1.6191 5 1 1 4 58.26 1.75 1.5835 2 6 2 4 58.55 5.41 1.5764 4 0 2 2 59.04 4.81 1.5645 1 9 1 4 59.40 8.79 1.5559 4 6 1 4 59.62 7.85 1.5508 5 3 1 4 59.75 3.62 1.5477 3 5 2 4 62.16 2.08 1.4933 0 2 3 2 63.51 14.12 1.4649 3 9 0 4 63.52 1.48 1.4646 0 8 2 2 64.13 5.70 1.4523 6 0 0 2 64.33 1.34 1.4481 0 10 1 2 64.80 7.83 1.4388 1 3 3 4 66.15 1.28 1.4127 2 2 3 4 67.10 1.46 1.3949 3 9 1 4 68.96 2.89 1.3618 6 2 1 4 69.22 1.23 1.3573 6 4 0 4 69.91 1.24 1.3456 1 9 2 4 70.24 1.19 1.3401 4 6 2 4 70.43 2.98 1.3368 5 3 2 4 72.31 12.69 1.3067 0 6 3 2 72.43 1.43 1.3048 5 7 1 4 72.51 11.23 1.3037 3 3 3 4 74.59 2.42 1.2723 0 12 0 2 75.35 2.31 1.2613 6 6 0 4 76.04 11.44 1.2516 2 6 3 4 77.39 6.51 1.2331 3 9 2 4 77.95 1.28 1.2257 0 12 1 2 77.96 5.49 1.2255 6 0 2 2 78.28 7.62 1.2213 2 12 0 4 78.70 4.67 1.2158 6 6 1 4 78.72 4.84 1.2156 5 9 0 4 79.33 1.85 1.2078 3 11 1 4 81.59 1.22 1.1799 2 12 1 4 82.03 3.71 1.1747 5 9 1 4 82.53 6.44 1.1689 7 3 1 4 82.70 1.70 1.1669 6 4 2 4 84.45 1.32 1.1471 3 7 3 4 87.13 8.30 1.1186 5 3 3 4 88.51 1.55 1.1047 2 0 4 2 88.57 2.44 1.1041 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.