Citation: O'Neill H St C; Dollase, W. A. (1994). Crystal structures and cation distributions in simple spinels from powder XRD structural refinements: MgCr2O4, ZnCr2O4, Fe3O4 and the temperature dependence of the cation distribution in ZnAl2O4 Sample: MgCr2O4/900, original background less 7 to 18 degrees 2 theta. Physics and Chemistry of Minerals, 20, pp. 541-555.