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 = 900 C _database_code_amcsd 0008808 CELL PARAMETERS: 8.1726 8.1726 8.1726 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 545.859 Density (g/cm3): 3.569 MAX. ABS. INTENSITY / VOLUME**2: 19.06037722 RIR: 1.739 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.81 37.48 4.7185 1 1 1 8 30.95 30.12 2.8895 2 2 0 12 36.46 100.00 2.4641 3 1 1 24 44.34 55.02 2.0431 4 0 0 6 55.05 7.74 1.6682 4 2 2 24 58.70 3.05 1.5728 3 3 3 8 58.70 37.69 1.5728 5 1 1 24 64.50 61.19 1.4447 4 4 0 12 67.84 3.23 1.3814 5 3 1 48 73.25 2.21 1.2922 6 2 0 24 76.42 8.22 1.2463 5 3 3 24 77.47 1.13 1.2321 6 2 2 24 81.62 5.48 1.1796 4 4 4 8 84.70 2.22 1.1444 5 5 1 24 89.80 3.43 1.0921 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.