Ifu ya Alumina ni ibintu bidasanzwe hamwe na formula ya chimique Al2O3.Nibintu bikomeye cyane hamwe nubushyuhe bwa 2054 ° C hamwe nubushyuhe bwa 2980 ° C.Ni ionic kristal ishobora ionize mubushyuhe bwinshi kandi ikoreshwa kenshi mugukora ibikoresho byangiritse.