Ludwigite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060010 Irwin M B, Peterson R C The Canadian Mineralogist 37 (1999) 939-943 The crystal structure of ludwigite Locality: Crestmore quarry, California, USA CELL PARAMETERS: 9.241100 12.29480 3.021300 90.00000 90.00000 90.00000 SPACE GROUP: Pbam X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 12.01 12.06 7.3742 1 1 0 14.46 10.11 6.1272 0 2 0 17.38 100.00 5.1053 1 2 0 19.23 1.68 4.6165 2 0 0 29.15 3.21 3.0636 0 4 0 29.58 27.63 3.0200 0 0 1 29.93 11.29 2.9850 3 1 0 30.74 5.29 2.9077 1 4 0 32.02 8.96 2.7947 1 1 1 32.55 13.88 2.7502 3 2 0 33.06 7.15 2.7088 0 2 1 34.50 1.12 2.5992 1 2 1 35.15 87.75 2.5526 2 4 0 35.51 71.08 2.5272 2 0 1 36.28 1.41 2.4752 2 1 1 37.97 2.31 2.3688 1 5 0 38.31 7.63 2.3485 1 3 1 38.52 9.18 2.3363 2 2 1 39.01 7.11 2.3082 4 0 0 41.71 23.37 2.1647 2 5 0 41.80 1.29 2.1601 4 2 0 41.99 9.04 2.1507 0 4 1 42.03 5.72 2.1492 2 3 1 42.57 24.48 2.1230 3 1 1 44.54 57.20 2.0334 3 2 1 45.47 13.73 1.9942 1 6 0 46.57 14.96 1.9495 2 4 1 47.40 4.00 1.9172 3 5 0 47.68 25.44 1.9064 3 3 1 48.73 6.22 1.8678 2 6 0 48.84 1.37 1.8639 1 5 1 49.69 2.81 1.8339 4 0 1 51.68 7.99 1.7680 5 2 0 51.84 2.18 1.7629 3 4 1 51.95 1.64 1.7594 2 5 1 52.03 11.39 1.7569 4 2 1 53.23 1.17 1.7200 1 7 0 53.85 3.17 1.7018 3 6 0 55.17 9.51 1.6641 1 6 1 58.03 5.72 1.5885 2 6 1 58.64 24.51 1.5735 4 4 1 60.40 7.28 1.5318 0 8 0 60.66 16.35 1.5258 5 2 1 61.31 2.37 1.5111 1 8 0 61.37 24.64 1.5100 0 0 2 62.07 23.30 1.4946 1 7 1 62.63 7.57 1.4826 3 6 1 62.99 3.73 1.4748 5 5 0 63.23 17.07 1.4699 5 3 1 63.30 1.31 1.4683 4 5 1 64.30 5.21 1.4480 1 2 2 68.15 15.95 1.3751 6 4 0 68.46 1.04 1.3697 5 6 0 68.38 1.61 1.3711 6 0 1 68.67 4.78 1.3661 0 8 1 69.08 2.05 1.3589 3 7 1 69.52 3.26 1.3514 1 8 1 69.76 1.30 1.3474 3 1 2 70.32 1.18 1.3380 6 2 1 71.10 1.21 1.3252 5 5 1 71.20 2.66 1.3236 3 2 2 72.05 3.53 1.3100 2 8 1 72.48 1.34 1.3032 6 5 0 72.72 16.71 1.2996 2 4 2 73.38 2.94 1.2895 7 2 0 74.26 4.35 1.2763 4 8 0 75.14 2.80 1.2636 4 0 2 76.00 3.13 1.2515 6 4 1 76.29 1.44 1.2474 5 6 1 76.45 1.37 1.2452 3 9 0 76.94 3.71 1.2385 2 5 2 79.58 3.73 1.2038 1 6 2 79.66 1.93 1.2029 7 1 1 81.01 1.06 1.1862 3 5 2 81.89 2.19 1.1756 4 8 1 82.01 2.01 1.1742 2 6 2 83.76 5.44 1.1541 8 0 0 84.29 2.87 1.1482 5 2 2 85.17 1.32 1.1385 3 10 0 86.02 1.37 1.1295 3 6 2 86.02 1.37 1.1295 3 6 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.