Hercynite Andreozzi G B, Lucchesi S American Mineralogist 87 (2002) 1113-1120 Intersite distribution of Fe2+ and Mg in the spinel (sensu stricto) - hercynite series by single-crystal X-ray diffraction Sample: He7a/b Note: Coordinates of oxygen changed in order to match the bond lengths. _database_code_amcsd 0002879 CELL PARAMETERS: 8.1306 8.1306 8.1306 90.000 90.000 90.000 SPACE GROUP: Fd3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 537.487 Density (g/cm3): 3.994 MAX. ABS. INTENSITY / VOLUME**2: 32.22553189 RIR: 2.627 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 18.90 2.67 4.6942 1 1 1 8 31.11 52.69 2.8746 2 2 0 12 36.66 100.00 2.4515 3 1 1 24 44.58 21.62 2.0326 4 0 0 6 48.82 2.53 1.8653 3 3 1 24 55.36 15.04 1.6597 4 2 2 24 59.03 37.93 1.5647 5 1 1 24 59.03 3.70 1.5647 3 3 3 8 64.87 53.48 1.4373 4 4 0 12 73.69 4.85 1.2856 6 2 0 24 76.89 9.60 1.2399 5 3 3 24 82.13 2.33 1.1736 4 4 4 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.