Haiweeite Burns P CDiffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R061051 The Canadian Mineralogist 39 (2001) 1153-1160 A new uranyl silicate sheet in the structure of haiweeite and comparison to other uranyl silicates CELL PARAMETERS: 7.1340 17.9410 18.2850 90.000 90.000 90.000 SPACE GROUP: Cmcm ATOM X Y Z OCCUPANCY ISO(B) U 0.00000 0.39036 0.25000 1.000 0.995 U 0.50000 0.28612 0.25000 1.000 1.176 Si 0.00000 0.21480 0.25000 1.000 1.334 Si 0.50000 0.46080 0.25000 1.000 1.816 Si 0.10790 0.08710 0.35240 0.500 1.271 Si 0.00000 0.58580 0.27440 0.500 0.987 Ca 0.00000 0.38870 0.48500 0.500 3.190 O 0.00000 0.16060 0.32120 1.000 2.250 O 0.50000 0.51540 0.31990 1.000 2.842 O 0.32400 0.40490 0.25000 1.000 2.148 O 0.17700 0.27030 0.25000 1.000 2.037 O 0.00000 0.38990 0.34700 1.000 3.766 O 0.00000 0.50900 0.27400 0.500 2.329 O 0.50000 0.28730 0.34850 1.000 3.229 O 0.50000 0.16230 0.27270 0.500 0.995 O -0.17600 0.58450 0.33160 0.500 2.250 OH 0.08300 0.08800 0.43900 0.500 3.379 Wa 0.17200 0.09200 0.55100 0.250 4.998 Wa 0.10200 0.27100 0.45300 0.250 7.335 Wa -0.10700 0.52000 0.42200 0.250 3.743 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 6 +/- 16 +/- 16 MAX. ABS. INTENSITY / VOLUME**2: 108.7991851 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.67 100.00 9.1425 0 0 2 9.86 1.39 8.9705 0 2 0 10.99 21.96 8.0535 0 2 1 13.36 1.59 6.6291 1 1 0 13.83 5.41 6.4030 0 2 2 16.52 1.65 5.3668 1 1 2 17.59 13.04 5.0414 0 2 3 19.42 15.34 4.5712 0 0 4 19.79 2.04 4.4868 1 1 3 19.97 23.33 4.4455 1 3 1 20.39 1.54 4.3561 0 4 1 21.82 2.58 4.0729 0 2 4 23.64 3.46 3.7633 1 1 4 24.30 6.17 3.6630 1 3 3 24.96 14.39 3.5670 2 0 0 26.32 7.53 3.3864 0 2 5 26.83 13.28 3.3230 2 0 2 27.35 5.90 3.2614 2 2 1 27.83 9.93 3.2056 1 5 0 28.26 2.99 3.1574 1 5 1 28.65 1.33 3.1161 2 2 2 29.31 3.59 3.0475 0 0 6 29.53 16.60 3.0250 1 5 2 29.88 2.12 2.9902 0 6 0 30.70 4.17 2.9118 2 2 3 31.29 2.49 2.8585 1 3 5 31.53 1.83 2.8371 1 5 3 31.82 7.07 2.8122 2 0 4 34.16 9.51 2.6246 1 5 4 35.80 2.74 2.5080 0 2 7 36.59 2.30 2.4559 2 2 5 37.28 1.94 2.4121 1 7 0 37.61 2.79 2.3913 1 7 1 38.60 2.05 2.3323 1 7 2 38.87 2.60 2.3170 2 0 6 39.42 2.08 2.2856 0 0 8 39.72 1.99 2.2694 1 3 7 40.21 1.11 2.2428 1 7 3 40.53 2.40 2.2259 0 8 1 40.86 2.93 2.2087 1 5 6 41.15 5.08 2.1938 3 3 1 42.37 1.51 2.1333 1 7 4 42.97 1.69 2.1047 0 8 3 43.57 2.63 2.0774 3 3 3 44.14 1.75 2.0516 2 2 7 45.02 1.53 2.0135 1 7 5 45.77 4.21 1.9822 3 5 0 45.79 1.60 1.9815 0 2 9 46.90 4.43 1.9372 3 5 2 47.23 2.17 1.9244 2 0 8 47.56 1.48 1.9118 0 8 5 48.11 1.46 1.8913 1 7 6 48.11 2.22 1.8913 3 3 5 48.19 2.32 1.8884 2 8 1 48.94 3.46 1.8610 1 5 8 49.05 2.41 1.8573 1 3 9 49.87 1.83 1.8285 0 0 10 50.16 3.61 1.8186 3 5 4 50.34 1.39 1.8127 2 8 3 51.16 1.22 1.7855 0 10 1 51.22 1.19 1.7835 4 0 0 52.26 2.18 1.7505 4 0 2 52.56 1.40 1.7413 4 2 1 52.85 1.63 1.7322 2 2 9 54.38 1.05 1.6870 3 3 7 55.28 2.04 1.6616 3 5 6 55.29 1.80 1.6615 4 0 4 55.38 1.14 1.6591 1 7 8 56.56 1.29 1.6272 2 0 10 57.74 1.07 1.5967 2 10 1 58.07 1.48 1.5883 1 5 10 59.12 1.16 1.5627 1 3 11 61.97 1.92 1.4975 3 5 8 62.06 1.16 1.4956 3 3 9 68.14 1.28 1.3762 1 5 12 70.00 1.38 1.3440 3 5 10 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.