Phenakite Tsirelson V G, Sokolova Y V, Urusov V S Geochemistry International 24 (1987) 101-110 An X-ray diffraction study of the electron-density distribution and electrostatic potential in phenakite Be2SiO4 Locality: natural crystal from unreported locality _database_code_amcsd 0020478 CELL PARAMETERS: 12.4850 12.4850 8.2640 90.000 90.000 120.000 SPACE GROUP: R-3 X-RAY WAVELENGTH: 1.541838 Cell Volume: 1115.573 Density (g/cm3): 2.950 MAX. ABS. INTENSITY / VOLUME**2: 6.686684958 RIR: 0.738 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.19 46.70 6.2425 1 1 0 6 19.62 2.07 4.5241 0 2 1 6 23.04 24.06 3.8598 0 1 2 6 24.30 46.46 3.6632 3 -1 1 6 24.30 27.36 3.6632 2 1 1 6 24.70 33.86 3.6041 3 0 0 6 27.16 2.91 3.2829 2 0 2 6 28.60 100.00 3.1212 2 2 0 6 30.77 6.47 2.9056 -1 3 2 6 30.77 8.91 2.9056 1 2 2 6 31.74 3.61 2.8189 -1 4 1 6 31.74 8.37 2.8189 1 3 1 6 35.62 37.60 2.5202 2 -1 3 6 35.62 37.47 2.5202 1 1 3 6 38.14 2.97 2.3594 1 4 0 6 38.14 48.50 2.3594 4 1 0 6 39.85 5.46 2.2620 0 4 2 6 41.25 32.52 2.1886 0 3 3 6 41.25 32.75 2.1886 3 0 3 6 42.51 1.34 2.1267 2 3 2 6 43.49 42.87 2.0808 3 3 0 6 44.65 3.04 2.0293 1 0 4 6 45.74 5.16 1.9836 2 4 1 6 47.45 9.41 1.9159 5 0 2 6 49.43 1.83 1.8438 3 -1 4 6 49.43 1.37 1.8438 2 1 4 6 50.66 3.14 1.8021 6 0 0 6 50.96 6.72 1.7920 4 1 3 6 50.96 6.74 1.7920 -1 5 3 6 52.03 3.41 1.7575 -1 6 2 6 52.67 1.30 1.7378 4 3 1 6 52.67 4.81 1.7378 7 -3 1 6 52.88 12.06 1.7314 2 5 0 6 52.88 1.47 1.7314 5 2 0 6 55.33 10.54 1.6604 6 -3 3 6 55.33 10.52 1.6604 3 3 3 6 56.02 2.13 1.6415 4 0 4 6 56.35 1.07 1.6329 3 4 2 6 56.95 1.60 1.6170 1 6 1 6 60.42 3.11 1.5322 1 2 5 6 60.42 2.09 1.5322 -1 3 5 6 61.49 11.14 1.5080 0 6 3 6 61.49 11.07 1.5080 6 0 3 6 62.14 4.12 1.4938 0 5 4 6 63.01 3.10 1.4753 6 2 1 6 63.01 1.07 1.4753 8 -2 1 6 65.14 8.44 1.4321 7 1 0 6 65.14 7.21 1.4321 1 7 0 6 66.03 1.50 1.4150 5 1 4 6 68.07 18.36 1.3773 0 0 6 2 68.93 1.40 1.3622 3 6 0 6 68.93 1.57 1.3622 6 3 0 6 71.93 1.79 1.3127 4 5 2 6 72.46 1.07 1.3044 -2 9 1 6 73.73 1.17 1.2850 6 -2 5 6 74.70 19.34 1.2707 1 7 3 6 74.70 19.38 1.2707 8 -1 3 6 74.70 5.49 1.2707 -1 8 3 6 74.70 5.47 1.2707 7 1 3 6 75.44 3.74 1.2601 4 -2 6 6 75.44 3.72 1.2601 2 2 6 6 78.30 9.60 1.2211 6 3 3 6 78.30 9.57 1.2211 -3 9 3 6 79.12 1.46 1.2104 3 4 5 6 79.84 11.58 1.2014 9 0 0 6 80.80 4.71 1.1895 4 1 6 6 80.80 4.74 1.1895 -1 5 6 6 84.19 1.22 1.1501 9 -4 4 6 84.32 2.06 1.1485 6 -3 6 6 84.32 2.07 1.1485 3 3 6 6 85.37 1.11 1.1372 -5 -5 3 6 85.37 1.11 1.1372 5 5 3 6 85.64 1.27 1.1342 3 -1 7 6 87.93 1.34 1.1105 -2 8 5 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.