Other oxides such as uranium dioxide ( UO ) and uranium trioxide ( UO ) exist .
Modern yellowcake typically contains 70 % to 90 % triuranium octoxide ( U O ) by weight .
Other oxides such as uranium dioxide ( U O ) and uranium trioxide ( U O ) exist .
Modern yellowcake typically contains 70 % to 90 % triuranium octoxide ( U O ) by weight .