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, 3rd run, T = 800 C _database_code_amcsd 0008807 CELL PARAMETERS: 8.1655 8.1655 8.1655 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 544.438 Density (g/cm3): 3.578 MAX. ABS. INTENSITY / VOLUME**2: 19.19732520 RIR: 1.747 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.82 38.25 4.7144 1 1 1 8 30.98 30.19 2.8869 2 2 0 12 36.50 100.00 2.4620 3 1 1 24 44.38 55.70 2.0414 4 0 0 6 55.10 7.73 1.6668 4 2 2 24 58.76 3.00 1.5715 3 3 3 8 58.76 38.62 1.5715 5 1 1 24 64.56 62.45 1.4435 4 4 0 12 67.91 3.43 1.3802 5 3 1 48 73.33 2.20 1.2911 6 2 0 24 76.50 8.42 1.2452 5 3 3 24 77.55 1.15 1.2310 6 2 2 24 81.70 5.74 1.1786 4 4 4 8 84.79 2.42 1.1434 5 5 1 24 89.90 3.53 1.0912 6 4 2 48 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.