Bannisterite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060817 Heaney P J, Post J E, Evans H T Clays and Clay Minerals 40 (1992) 129-144 The crystal structure of bannisterite Locality: Broken Hill, Australia CELL PARAMETERS: 22.28600 16.38600 24.57500 90.00000 94.35500 90.00000 SPACE GROUP: A2/a X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 7.22 100.00 12.2636 0 0 2 7.77 1.08 11.4049 1 1 1 14.46 2.01 6.1318 0 0 4 19.31 2.83 4.5989 4 2 0 20.76 1.12 4.2796 -5 1 1 21.74 4.63 4.0879 0 0 6 23.44 2.46 3.7953 -4 2 4 24.92 1.56 3.5730 4 2 4 26.01 2.94 3.4264 0 1 7 26.02 2.54 3.4249 -1 1 7 26.16 1.96 3.4067 0 4 4 26.62 2.68 3.3492 1 1 7 29.12 6.14 3.0659 0 0 8 32.05 4.55 2.7924 4 5 1 32.11 1.01 2.7868 3 5 3 32.49 3.51 2.7550 -8 0 2 33.99 9.63 2.6374 4 5 3 34.41 5.56 2.6060 -8 0 4 36.08 1.27 2.4887 -4 5 5 36.24 1.20 2.4782 5 5 3 37.35 5.37 2.4071 4 5 5 37.73 3.37 2.3834 -8 0 6 40.23 1.63 2.2410 -4 5 7 40.61 1.13 2.2208 8 0 6 41.85 2.51 2.1581 4 5 7 42.19 1.11 2.1411 -8 0 8 47.22 1.32 1.9240 4 5 9 56.95 2.38 1.6161 -12 5 1 57.49 1.40 1.6023 -12 5 3 57.50 1.30 1.6021 12 5 1 57.50 1.30 1.6021 12 5 1 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.