Corundum Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R110110 Kirfel A, Eichhorn K Acta Crystallographica A46 (1990) 271-284 Accurate structure analysis with synchrotron radiation. The electron density in Al2O3 and Cu2O Locality: synthetic _database_code_amcsd 0009327 CELL PARAMETERS: 4.7900 4.7900 12.9300 90.000 90.000 120.000 SPACE GROUP: R-3c ATOM X Y Z OCCUPANCY ISO(B) Al 0.00000 0.00000 0.35218 1.000 0.209 O 0.30625 0.00000 0.25000 1.000 0.253 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 3 +/- 3 +/- 11 MAX. ABS. INTENSITY / VOLUME**2: 12.23167397 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 25.51 61.46 3.4913 0 1 2 35.20 95.20 2.5498 1 0 4 37.55 44.68 2.3950 1 1 0 43.21 100.00 2.0935 1 1 3 45.95 1.45 1.9750 2 0 2 52.41 49.99 1.7457 0 2 4 57.53 98.81 1.6020 1 1 6 59.38 2.65 1.5565 2 1 1 60.79 3.32 1.5237 1 2 2 61.58 7.43 1.5060 0 1 8 66.25 39.85 1.4107 2 1 4 67.77 62.23 1.3828 3 0 0 70.20 1.31 1.3407 1 2 5 74.41 1.51 1.2749 2 0 8 77.29 17.32 1.2344 1 0 10 77.47 9.41 1.2320 1 1 9 80.15 2.31 1.1975 2 2 0 83.85 1.94 1.1538 2 2 3 85.78 1.42 1.1327 3 1 2 86.48 2.99 1.1254 1 2 8 89.27 8.25 1.0973 0 2 10 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.