Leightonite Menchetti S, Bindi L, Bonazzi P, Olmi F American Mineralogist 87 (2002) 721-725 Disordered distribution of Cu in the crystal structure of leightonite, K2Ca2Cu(SO4)4.2H2O Note: H-positions estimated by Kurt Mereiter Locality: Chuquicamata, Chile _database_code_amcsd 0002814 CELL PARAMETERS: 11.6540 7.4970 10.0970 90.000 125.210 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 720.776 Density (g/cm3): 2.959 MAX. ABS. INTENSITY / VOLUME**2: 12.85585043 RIR: 1.415 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 15.04 13.05 5.8903 1 1 0 4 15.04 1.50 5.8890 -1 1 1 4 18.64 6.36 4.7609 2 0 0 2 21.44 3.54 4.1439 -1 1 2 4 26.11 8.53 3.4127 0 2 1 4 26.40 15.68 3.3765 -3 1 1 4 26.40 7.16 3.3758 -3 1 2 4 28.31 100.00 3.1525 -2 2 1 4 30.36 1.25 2.9445 -2 2 2 4 30.57 50.42 2.9241 1 1 2 4 30.58 64.64 2.9232 -1 1 3 4 30.59 9.26 2.9228 3 1 0 4 30.60 15.01 2.9213 -3 1 3 4 30.69 27.04 2.9135 -4 0 2 2 35.85 6.51 2.5052 2 2 1 4 35.86 5.71 2.5043 -2 2 3 4 36.11 2.06 2.4875 2 0 2 2 37.72 4.29 2.3851 3 1 1 4 37.74 8.09 2.3837 -3 1 4 4 37.79 2.14 2.3805 4 0 0 2 37.82 1.94 2.3790 -4 0 4 2 40.69 2.67 2.2173 0 2 3 4 40.71 6.06 2.2161 -4 2 1 4 40.73 5.82 2.2155 -4 2 3 4 40.88 2.21 2.2076 -1 1 4 4 40.92 1.09 2.2056 -5 1 3 4 43.90 5.52 2.0624 0 0 4 2 46.23 8.10 1.9638 1 3 2 4 46.23 6.68 1.9636 -1 3 3 4 46.24 3.21 1.9634 3 3 0 4 46.25 4.78 1.9630 -3 3 3 4 46.66 2.64 1.9466 3 1 2 4 46.69 4.49 1.9455 -3 1 5 4 48.12 2.01 1.8909 -6 0 2 2 48.58 5.26 1.8743 0 4 0 2 49.38 7.83 1.8457 5 1 0 4 49.41 5.26 1.8447 -5 1 5 4 51.55 17.41 1.7730 3 3 1 4 51.57 12.52 1.7724 -3 3 4 4 51.80 1.79 1.7649 4 2 1 4 51.83 1.99 1.7640 -4 2 5 4 53.11 5.61 1.7246 -6 2 3 4 53.72 8.79 1.7064 0 4 2 4 54.34 2.63 1.6883 -6 2 2 4 54.35 2.54 1.6879 -6 2 4 4 54.49 1.33 1.6839 4 0 2 2 54.53 1.59 1.6828 -4 0 6 2 56.88 2.14 1.6188 5 1 1 4 56.92 1.46 1.6178 -5 1 6 4 58.12 1.99 1.5873 -2 0 6 2 58.17 2.02 1.5860 -6 0 6 2 58.56 5.86 1.5763 -4 4 2 4 61.19 3.95 1.5147 5 3 0 4 61.22 5.61 1.5141 -5 3 5 4 61.39 3.49 1.5101 0 2 5 4 62.73 1.46 1.4811 -1 5 1 4 63.68 1.09 1.4614 6 2 0 4 63.71 1.03 1.4606 -6 2 6 4 63.82 3.24 1.4584 -7 1 1 4 63.86 2.44 1.4577 -7 1 6 4 63.90 7.20 1.4567 -8 0 4 2 69.30 2.62 1.3559 1 5 2 4 69.31 1.62 1.3558 -1 5 3 4 70.18 6.43 1.3411 4 2 3 4 70.22 6.58 1.3404 -4 2 7 4 71.26 1.14 1.3234 6 2 1 4 71.31 1.10 1.3226 -6 2 7 4 73.53 1.94 1.2880 3 5 1 4 73.55 1.73 1.2878 -3 5 4 4 74.25 1.13 1.2773 -7 3 6 4 75.59 2.08 1.2579 6 0 2 2 78.25 5.15 1.2217 -2 6 1 4 78.33 1.37 1.2207 -3 3 7 4 79.04 3.59 1.2115 2 4 4 4 79.06 2.50 1.2113 -2 4 6 4 81.75 1.14 1.1781 5 5 0 4 81.77 1.15 1.1778 -5 5 5 4 88.12 1.51 1.1086 0 4 6 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.