An X-ray magnetic circular dichroism (XMCD) study of Fe ordering in a synthetic MgAl2O4-Fe3O4 (spinel-magnetite) solid-solution series: Implications for magnetic properties and cation site ordering - Henderson,CMB; Pearce,CI; Charnock,JM; Harrison,RJ; Rosso,KM (AMERICAN MINERALOGIST, 2016)