Howlite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050588 Finney J J, Kumbasar I, Konnert J A, Clark J R American Mineralogist 55 (1970) 716-728 Crystal structure of the calcium silicoborate, howlite CELL PARAMETERS: 12.80341 9.346118 8.606481 90.00000 104.8369 90.00000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 7.17 19.05 12.3765 1 0 0 11.89 3.38 7.4584 1 1 0 14.27 97.32 6.2142 0 1 1 14.33 16.88 6.1883 2 0 0 14.69 10.34 6.0357 -1 1 1 17.16 7.50 5.1710 1 1 1 17.20 1.54 5.1597 2 1 0 18.21 4.33 4.8759 -2 1 1 19.00 2.45 4.6731 0 2 0 20.33 22.48 4.3718 1 2 0 20.72 9.32 4.2886 -1 0 2 21.37 8.56 4.1598 0 0 2 21.55 19.05 4.1255 3 0 0 22.11 12.04 4.0227 -1 2 1 22.51 7.31 3.9526 -2 0 2 22.83 100.00 3.8978 -1 1 2 23.42 5.54 3.8003 0 1 2 23.50 6.66 3.7870 -3 1 1 23.84 9.48 3.7335 1 2 1 23.87 6.03 3.7292 2 2 0 24.26 9.58 3.6695 1 0 2 24.62 12.19 3.6177 -2 2 1 26.10 3.26 3.4156 1 1 2 27.96 2.59 3.1919 -3 1 2 28.25 3.03 3.1597 -1 2 2 28.77 24.68 3.1039 2 0 2 28.81 41.17 3.0998 -3 2 1 28.86 15.17 3.0941 4 0 0 28.87 8.15 3.0927 3 2 0 29.57 9.03 3.0211 1 3 0 29.61 35.66 3.0178 -2 2 2 29.70 2.89 3.0089 -4 1 1 30.35 7.16 2.9457 2 1 2 30.44 33.77 2.9373 4 1 0 30.65 4.09 2.9175 0 3 1 30.85 32.98 2.8984 -1 3 1 31.30 20.80 2.8577 -4 0 2 32.15 24.62 2.7844 1 3 1 32.17 4.98 2.7826 2 3 0 32.60 5.74 2.7472 -3 2 2 32.77 3.03 2.7328 -4 1 2 32.77 10.00 2.7326 3 2 1 33.71 31.90 2.6586 0 1 3 34.12 3.95 2.6280 -4 2 1 34.31 5.16 2.6136 3 0 2 34.70 2.76 2.5855 2 2 2 34.77 6.68 2.5799 4 1 1 34.77 5.75 2.5799 4 2 0 35.67 14.11 2.5171 3 1 2 36.02 1.11 2.4936 0 3 2 36.07 1.85 2.4898 -3 3 1 36.13 1.16 2.4861 3 3 0 36.26 5.43 2.4774 1 1 3 36.29 8.39 2.4753 5 0 0 36.73 28.97 2.4467 -2 3 2 36.77 1.21 2.4439 -1 2 3 36.87 3.75 2.4380 -4 2 2 37.21 1.21 2.4164 -5 0 2 37.30 1.09 2.4106 -2 2 3 37.72 2.92 2.3849 0 2 3 38.48 11.09 2.3395 -5 1 2 38.68 2.15 2.3275 4 2 1 39.24 2.18 2.2957 -3 3 2 39.23 6.08 2.2960 1 4 0 39.39 4.18 2.2872 3 3 1 39.50 4.21 2.2811 3 2 2 40.04 3.38 2.2515 1 2 3 40.06 2.93 2.2505 2 1 3 40.08 3.40 2.2495 0 4 1 40.18 1.96 2.2440 -5 2 1 40.24 2.61 2.2407 -1 4 1 41.11 1.03 2.1954 4 3 0 41.28 5.77 2.1868 1 4 1 41.30 4.98 2.1859 2 4 0 41.78 8.07 2.1618 5 1 1 42.86 3.14 2.1097 -1 3 3 43.31 4.16 2.0886 -1 1 4 43.32 4.85 2.0882 -2 3 3 43.41 1.22 2.0841 -3 0 4 43.40 1.96 2.0848 -5 1 3 43.49 1.18 2.0803 -6 1 1 43.56 3.50 2.0771 2 2 3 43.69 14.64 2.0714 0 3 3 43.70 7.60 2.0711 -6 0 2 43.75 3.01 2.0687 2 4 1 43.88 7.74 2.0628 6 0 0 44.13 1.47 2.0518 -1 4 2 44.53 23.60 2.0341 -3 1 4 44.51 32.67 2.0351 -3 4 1 44.81 2.75 2.0221 -6 1 2 44.85 6.60 2.0203 3 1 3 45.00 7.86 2.0143 6 1 0 45.17 6.91 2.0068 5 2 1 45.28 1.12 2.0023 3 3 2 45.91 1.09 1.9763 -4 0 4 45.89 18.21 1.9771 -5 3 1 46.06 10.56 1.9703 1 0 4 46.62 2.95 1.9478 -1 2 4 46.79 1.25 1.9410 -6 2 1 47.13 13.42 1.9279 1 1 4 47.21 1.61 1.9249 -3 4 2 47.29 9.30 1.9219 5 0 2 47.34 9.42 1.9199 3 4 1 47.61 1.11 1.9094 -5 3 2 47.86 2.21 1.9002 0 2 4 47.94 19.08 1.8972 -4 3 3 48.04 3.42 1.8935 -6 2 2 48.21 1.81 1.8871 6 2 0 48.34 2.19 1.8825 5 1 2 48.96 14.32 1.8601 2 3 3 49.29 1.37 1.8483 1 5 0 49.48 8.18 1.8415 -5 0 4 49.68 1.07 1.8347 2 0 4 50.10 2.23 1.8202 -4 2 4 50.65 1.05 1.8017 -7 0 2 50.78 13.13 1.7976 -2 4 3 50.91 10.01 1.7933 -7 1 1 51.03 7.66 1.7894 2 5 0 51.10 4.59 1.7868 0 4 3 51.39 1.35 1.7774 5 2 2 51.42 1.92 1.7766 -2 5 1 51.65 1.18 1.7692 -7 1 2 51.68 3.23 1.7681 7 0 0 51.81 1.31 1.7641 -6 2 3 51.84 1.92 1.7632 -5 3 3 51.86 5.80 1.7624 4 4 1 51.92 1.73 1.7605 -6 3 1 52.67 1.74 1.7373 7 1 0 52.95 2.10 1.7286 1 4 3 53.06 2.66 1.7253 -5 4 1 53.13 2.51 1.7233 2 5 1 53.40 1.29 1.7151 4 2 3 53.47 2.40 1.7132 -5 2 4 53.65 3.47 1.7078 2 2 4 53.86 2.15 1.7017 -7 2 1 53.95 1.19 1.6991 5 4 0 53.98 1.30 1.6981 -6 0 4 54.22 1.27 1.6913 3 0 4 54.27 4.27 1.6898 -2 5 2 54.61 4.43 1.6800 -1 1 5 54.57 2.79 1.6811 -7 2 2 54.94 3.16 1.6707 -6 1 4 55.01 2.25 1.6688 -4 3 4 55.12 2.53 1.6656 1 5 2 55.17 1.83 1.6642 3 1 4 55.55 3.01 1.6537 7 2 0 55.84 12.75 1.6459 2 4 3 56.13 1.17 1.6381 0 1 5 56.26 3.51 1.6345 3 5 1 56.61 2.09 1.6253 -6 3 3 56.78 1.42 1.6209 7 1 1 57.43 2.69 1.6041 -1 2 5 57.64 1.37 1.5987 -7 2 3 58.42 1.36 1.5792 -1 4 4 58.54 1.95 1.5761 -7 3 1 58.56 1.02 1.5756 -6 4 1 58.93 4.80 1.5666 -8 1 2 59.28 1.65 1.5583 -7 0 4 59.30 1.85 1.5577 0 6 0 59.53 1.11 1.5524 7 2 1 59.67 3.24 1.5491 3 4 3 60.18 2.76 1.5371 -7 1 4 60.44 2.12 1.5310 4 1 4 60.56 2.02 1.5283 -1 6 1 60.65 1.77 1.5263 8 1 0 60.72 1.53 1.5246 -3 5 3 60.91 1.14 1.5204 3 5 2 61.48 1.09 1.5077 -8 1 3 61.53 1.06 1.5065 -2 3 5 62.05 7.25 1.4952 7 0 2 62.83 1.59 1.4785 -5 5 2 62.90 1.64 1.4769 -6 1 5 62.92 2.94 1.4765 -6 4 3 63.10 1.47 1.4728 -4 5 3 63.52 2.72 1.4641 -1 6 2 63.81 2.89 1.4580 -3 6 1 65.71 1.53 1.4204 1 3 5 65.70 1.49 1.4206 -8 3 1 65.80 1.67 1.4188 -1 0 6 66.31 1.03 1.4090 -2 5 4 66.42 2.49 1.4069 -4 0 6 67.36 2.52 1.3896 8 2 1 67.52 1.77 1.3866 0 0 6 67.46 1.03 1.3876 -6 5 2 67.57 5.00 1.3858 -2 4 5 67.60 1.11 1.3851 6 5 0 68.36 1.79 1.3716 0 1 6 68.95 2.04 1.3613 5 2 4 69.71 2.97 1.3484 -6 3 5 69.78 1.03 1.3472 5 4 3 70.26 5.98 1.3392 6 3 3 70.69 1.00 1.3320 1 6 3 70.85 1.62 1.3294 7 1 3 70.83 1.02 1.3298 6 5 1 71.56 1.25 1.3179 1 4 5 71.55 1.15 1.3180 -8 4 1 71.81 1.05 1.3140 -8 4 2 71.93 1.36 1.3120 -9 0 4 72.40 1.70 1.3046 -6 1 6 72.37 1.92 1.3051 2 7 0 73.08 1.88 1.2942 6 1 4 74.38 3.63 1.2748 -1 7 2 74.97 1.28 1.2662 -2 5 5 75.82 1.11 1.2541 3 5 4 76.61 2.52 1.2431 6 6 0 77.89 1.55 1.2259 4 7 0 78.81 1.23 1.2138 1 5 5 79.01 4.06 1.2112 -9 4 1 79.10 1.09 1.2101 5 6 2 79.13 1.38 1.2096 -4 7 2 79.17 1.11 1.2092 -9 3 4 80.77 2.73 1.1893 -5 6 4 80.83 2.40 1.1884 -3 2 7 80.79 1.46 1.1890 3 7 2 80.81 2.50 1.1887 -9 4 3 81.18 1.98 1.1843 8 2 3 82.53 1.58 1.1683 0 8 0 83.84 1.39 1.1533 5 3 5 84.08 1.42 1.1506 4 1 6 84.06 1.53 1.1509 -1 6 5 84.62 1.65 1.1447 -8 4 5 84.76 3.39 1.1431 -3 3 7 84.89 2.50 1.1416 -11 1 3 85.68 1.23 1.1332 -1 7 4 85.81 1.01 1.1317 3 5 5 85.95 1.04 1.1303 -1 3 7 86.53 2.08 1.1242 -3 7 4 86.54 1.04 1.1241 3 8 0 87.28 1.67 1.1165 -11 0 4 88.46 1.76 1.1046 8 1 4 88.49 1.57 1.1043 10 3 1 89.30 2.01 1.0964 5 4 5 89.30 2.01 1.0964 5 4 5 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.