I-Alumina powder iyisithako esingaphili nefomula yamakhemikhali ethi Al2O3.Kuyinhlanganisela yobulukhuni obuphezulu enephuzu lokuncibilika elingu-2054°C kanye nephuzu lokubila elingu-2980°C.Kuyikristalu ye-ionic ekwazi ukwenza ionize ekushiseni okuphezulu futhi ivame ukusetshenziswa ekwenzeni izinto eziphikisayo.