Lavina B , Cesare B , Alvarez-Valero A M , Uchida H , Downs R T , Koneva A , Dera P , American Mineralogist , 94 (2009) p.657-665, Closure temperatures of intracrystalline ordering in anatectic and metamorphic, hercynite, Fe2+Al2O4, Note: Sample HO19, Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain