Spinel Martignago F, Dal Negro A, Carbonin S Physics and Chemistry of Minerals 30 (2003) 401-408 How Cr3+ and Fe3+ affect Mg-Al order-disorder transformation at high temperature in natural spinels Sample: H-Cr, 1st run, T = 400 C _database_code_amcsd 0008799 CELL PARAMETERS: 8.1315 8.1315 8.1315 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 537.665 Density (g/cm3): 3.623 MAX. ABS. INTENSITY / VOLUME**2: 19.93618602 RIR: 1.792 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.90 42.02 4.6947 1 1 1 8 31.11 30.83 2.8749 2 2 0 12 36.65 100.00 2.4517 3 1 1 24 44.57 57.53 2.0329 4 0 0 6 55.35 7.95 1.6598 4 2 2 24 59.03 2.81 1.5649 3 3 3 8 59.03 43.46 1.5649 5 1 1 24 64.87 67.93 1.4375 4 4 0 12 68.23 4.14 1.3745 5 3 1 48 73.68 2.26 1.2857 6 2 0 24 76.88 9.60 1.2400 5 3 3 24 77.93 1.39 1.2259 6 2 2 24 82.12 6.68 1.1737 4 4 4 8 85.23 3.28 1.1386 5 5 1 24 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.