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: L-Cr, 2nd run, T = 500 C _database_code_amcsd 0008771 CELL PARAMETERS: 8.1256 8.1256 8.1256 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 536.496 Density (g/cm3): 3.565 MAX. ABS. INTENSITY / VOLUME**2: 18.59587307 RIR: 1.698 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.92 38.42 4.6913 1 1 1 8 31.13 32.85 2.8728 2 2 0 12 36.68 100.00 2.4500 3 1 1 24 44.61 57.22 2.0314 4 0 0 6 55.39 8.42 1.6586 4 2 2 24 59.07 43.42 1.5638 5 1 1 24 59.07 2.74 1.5638 3 3 3 8 64.92 68.26 1.4364 4 4 0 12 68.29 3.65 1.3735 5 3 1 48 73.75 2.39 1.2848 6 2 0 24 76.95 9.41 1.2391 5 3 3 24 78.00 1.06 1.2250 6 2 2 24 82.19 6.42 1.1728 4 4 4 8 85.30 3.04 1.1378 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.