Uranyl hydroxide
Uranyl hydroxide is a hydroxide of uranium with the chemical formula UO(OH) in the monomeric form and (UO)(OH) in the dimeric; both forms may exist in normal aqueous media. Uranyl hydroxide hydrate is precipitated as a colloidal yellowcake from oxidized uranium liquors near neutral pH.
Zirconium(IV) hydroxide
Zirconium (IV) hydroxide, often called hydrous zirconia is an ill-defined material or family of materials variously described as ZrO2.\mathit{n}H2O and Zr(OH)4.\mathit{n}H2O. All are white solids with low solubility in water. These materials are widely employed in the preparation of solid acid catalysts.