Gehlenite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060841 Louisnathan S J The Canadian Mineralogist 10 (1971) 822-837 Refinement of the crystal structure of a natural gehlenite, Ca2Al(Al,Si)2O7 CELL PARAMETERS: 7.716000 7.716000 5.089000 90.00000 90.00000 90.00000 SPACE GROUP: P-42_1m X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 17.56 3.90 5.0454 0 0 1 21.00 4.28 4.2266 1 0 1 22.96 8.45 3.8699 2 0 0 23.97 35.60 3.7096 1 1 1 25.72 7.11 3.4614 2 1 0 29.06 8.70 3.0707 2 0 1 31.31 100.00 2.8542 2 1 1 36.69 3.98 2.4476 3 1 0 37.47 7.33 2.3985 1 0 2 37.35 25.87 2.4054 2 2 1 39.29 11.86 2.2910 1 1 2 39.19 14.20 2.2971 3 0 1 40.95 9.20 2.2021 3 1 1 42.75 1.29 2.1133 2 0 2 44.40 13.48 2.0387 2 1 2 45.90 2.41 1.9753 3 2 1 46.92 15.30 1.9350 4 0 0 48.45 9.23 1.8772 4 1 0 49.08 2.79 1.8548 2 2 2 49.95 8.13 1.8243 3 3 0 52.02 22.83 1.7566 3 1 2 51.93 3.94 1.7594 4 1 1 52.86 3.22 1.7307 4 2 0 53.36 1.93 1.7156 3 3 1 54.52 2.12 1.6818 0 0 3 56.22 3.70 1.6349 3 2 2 61.22 6.12 1.5127 2 1 3 62.81 2.74 1.4783 3 3 2 62.73 1.83 1.4799 5 0 1 65.04 5.05 1.4328 2 2 3 64.82 1.84 1.4373 5 2 0 66.29 1.76 1.4089 3 0 3 67.52 1.47 1.3861 3 1 3 67.73 9.88 1.3823 5 2 1 68.52 2.75 1.3682 4 4 0 71.16 2.16 1.3239 3 2 3 71.37 1.62 1.3205 4 4 1 73.33 2.33 1.2900 6 0 0 75.28 1.12 1.2613 0 0 4 75.90 5.68 1.2526 4 1 3 76.17 1.96 1.2488 5 2 2 77.26 2.01 1.2338 6 1 1 81.88 1.98 1.1755 5 4 1 84.51 1.17 1.1455 2 2 4 84.24 1.41 1.1485 6 0 2 85.11 1.43 1.1390 4 3 3 85.65 1.39 1.1332 3 0 4 85.38 1.01 1.1361 6 1 2 86.25 1.33 1.1268 5 1 3 86.79 1.17 1.1212 3 1 4 88.79 1.08 1.1011 6 2 2 89.66 1.12 1.0926 5 2 3 89.66 1.12 1.0926 5 2 3 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.