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 = 41 kbar Note: y-coordinate of O3 altered _database_code_amcsd 0007377 CELL PARAMETERS: 8.5870 14.9120 4.5901 90.000 90.000 90.000 SPACE GROUP: Cmc2_1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 587.759 Density (g/cm3): 2.669 MAX. ABS. INTENSITY / VOLUME**2: 6.344018603 RIR: 0.774 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.87 1.37 7.4560 0 2 0 2 11.89 23.20 7.4414 1 1 0 4 20.65 29.19 4.3019 1 3 0 4 20.69 94.68 4.2935 2 0 0 2 22.75 44.32 3.9088 0 2 1 2 22.76 11.42 3.9067 1 1 1 4 23.87 20.76 3.7280 0 4 0 2 28.44 100.00 3.1388 1 3 1 4 30.90 1.83 2.8938 0 4 1 2 30.94 10.38 2.8904 2 2 1 4 31.76 4.01 2.8173 1 5 0 4 31.79 4.52 2.8149 2 4 0 4 31.83 10.29 2.8110 3 1 0 4 36.14 22.98 2.4853 0 6 0 2 36.21 60.13 2.4805 3 3 0 4 37.46 1.26 2.4011 1 5 1 4 37.48 1.17 2.3996 2 4 1 4 37.52 7.61 2.3972 3 1 1 4 39.26 55.03 2.2950 0 0 2 1 41.15 2.25 2.1935 0 2 2 2 41.16 2.09 2.1931 1 1 2 4 41.31 24.13 2.1855 0 6 1 2 41.38 26.63 2.1822 3 3 1 4 42.00 1.27 2.1510 2 6 0 4 42.09 5.31 2.1467 4 0 0 2 43.84 4.37 2.0651 3 5 0 4 44.76 1.33 2.0249 1 3 2 4 44.78 5.03 2.0240 2 0 2 2 46.46 8.31 1.9544 0 4 2 2 46.63 13.91 1.9477 2 6 1 4 48.28 3.21 1.8852 1 7 1 4 48.33 1.55 1.8833 3 5 1 4 48.37 1.16 1.8816 4 2 1 4 48.86 1.76 1.8640 0 8 0 2 51.35 2.47 1.7794 1 5 2 4 51.37 2.00 1.7788 2 4 2 4 51.40 3.54 1.7778 3 1 2 4 53.02 1.50 1.7270 0 8 1 2 54.42 7.75 1.6861 0 6 2 2 54.47 11.27 1.6846 3 3 2 4 56.57 1.74 1.6269 1 9 0 4 56.66 1.02 1.6246 4 6 0 4 56.71 7.95 1.6232 5 3 0 4 57.55 3.98 1.6015 3 7 1 4 57.64 1.15 1.5992 5 1 1 4 58.84 1.40 1.5694 2 6 2 4 58.91 4.32 1.5678 4 0 2 2 60.29 5.82 1.5351 3 5 2 4 60.36 4.66 1.5334 1 9 1 4 60.45 9.57 1.5315 4 6 1 4 60.50 6.33 1.5304 5 3 1 4 61.91 2.84 1.4988 0 2 3 2 61.91 1.52 1.4987 1 1 3 4 64.39 1.38 1.4469 0 8 2 2 64.66 6.74 1.4416 1 3 3 4 65.04 18.50 1.4340 3 9 0 4 65.19 7.74 1.4312 6 0 0 2 66.02 1.29 1.4151 2 2 3 4 68.42 1.00 1.3711 2 8 2 4 70.01 3.08 1.3439 6 2 1 4 70.01 2.00 1.3439 3 1 3 4 70.48 1.30 1.3361 6 4 0 4 71.10 1.01 1.3260 4 6 2 4 71.14 2.53 1.3253 5 3 2 4 72.55 10.60 1.3029 0 6 3 2 72.60 11.84 1.3022 3 3 3 4 73.82 1.42 1.2837 5 7 1 4 76.25 1.49 1.2487 5 5 2 4 76.39 8.64 1.2468 2 6 3 4 76.69 2.09 1.2427 0 12 0 2 76.86 2.63 1.2402 6 6 0 4 78.68 8.89 1.2161 3 9 2 4 78.81 5.21 1.2144 6 0 2 2 80.16 2.71 1.1973 6 6 1 4 80.46 5.23 1.1937 2 12 0 4 80.56 3.44 1.1924 5 9 0 4 81.27 1.96 1.1837 3 11 1 4 83.72 2.28 1.1553 2 12 1 4 83.77 2.37 1.1547 6 4 2 4 83.82 3.50 1.1541 5 9 1 4 83.94 6.41 1.1528 7 3 1 4 85.11 1.68 1.1399 3 7 3 4 85.19 1.05 1.1391 5 1 3 4 87.64 6.11 1.1134 5 3 3 4 88.12 1.13 1.1086 2 0 4 2 89.32 1.33 1.0967 0 4 4 2 89.91 2.52 1.0911 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.