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: M-Cr, 3rd run, T = 650 C _database_code_amcsd 0008790 CELL PARAMETERS: 8.1461 8.1461 8.1461 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 540.567 Density (g/cm3): 3.579 MAX. ABS. INTENSITY / VOLUME**2: 18.99333115 RIR: 1.728 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.87 39.83 4.7032 1 1 1 8 31.05 31.46 2.8801 2 2 0 12 36.59 100.00 2.4561 3 1 1 24 44.49 56.03 2.0365 4 0 0 6 55.24 8.00 1.6628 4 2 2 24 58.91 2.85 1.5677 3 3 3 8 58.91 41.25 1.5677 5 1 1 24 64.73 64.57 1.4400 4 4 0 12 68.09 3.61 1.3769 5 3 1 48 73.53 2.26 1.2880 6 2 0 24 76.72 8.94 1.2423 5 3 3 24 77.77 1.27 1.2281 6 2 2 24 81.94 5.94 1.1758 4 4 4 8 85.04 2.73 1.1407 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.