Spinel Meducin F, Redfern S A T, Le Godec Y, Stone H J, Tucker M G, Dove M T, Marshall W G American Mineralogist 89 (2004) 981-986 Study of cation order-disorder in MgAl2O4 spinel by in situ neutron diffraction up to 1600 K and 3.2 GPa Sample at T = 1507 K and P = 3.2 GPa, inversion parameter x = .633 _database_code_amcsd 0003575 CELL PARAMETERS: 8.1452 8.1452 8.1452 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 540.387 Density (g/cm3): 3.497 MAX. ABS. INTENSITY / VOLUME**2: 15.18386381 RIR: 1.414 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.87 30.86 4.7026 1 1 1 8 31.06 38.77 2.8798 2 2 0 12 36.59 100.00 2.4559 3 1 1 24 38.28 4.00 2.3513 2 2 2 8 44.49 54.01 2.0363 4 0 0 6 55.25 9.33 1.6626 4 2 2 24 58.92 1.93 1.5675 3 3 3 8 58.92 35.88 1.5675 5 1 1 24 64.74 58.33 1.4399 4 4 0 12 73.54 2.53 1.2879 6 2 0 24 76.73 5.88 1.2421 5 3 3 24 81.95 3.65 1.1757 4 4 4 8 85.05 1.16 1.1406 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.