I-crystal alumina enkulu eyodwa iyikristalu empushana emhlophe eyakhiwe ngokubalwa kwezinga lokushisa eliphezulu kwe-aluminium hydroxide noma i-alumina yezimboni ene-mineralizer ekhethekile.
I-Flake alumina inezakhiwo ezinhle kakhulu zangaphakathi nezici ezikhethekile zesakhiwo.