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, 2nd run, T = 450 C _database_code_amcsd 0008802 CELL PARAMETERS: 8.1358 8.1358 8.1358 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 538.519 Density (g/cm3): 3.617 MAX. ABS. INTENSITY / VOLUME**2: 19.78446691 RIR: 1.781 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.89 42.51 4.6972 1 1 1 8 31.09 30.95 2.8764 2 2 0 12 36.63 100.00 2.4530 3 1 1 24 44.55 57.18 2.0340 4 0 0 6 55.32 7.91 1.6607 4 2 2 24 58.99 2.78 1.5657 3 3 3 8 58.99 43.25 1.5657 5 1 1 24 64.83 67.03 1.4382 4 4 0 12 68.19 4.07 1.3752 5 3 1 48 73.64 2.23 1.2864 6 2 0 24 76.83 9.47 1.2407 5 3 3 24 77.89 1.41 1.2265 6 2 2 24 82.07 6.48 1.1743 4 4 4 8 85.17 3.20 1.1392 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.