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.
Lead(II) hydroxide
Lead(II) hydroxide, Pb(OH), is a hydroxide of lead, with lead in oxidation state +2. It is doubtful that such a simple compound exists. Lead basic carbonate (PbCO·2Pb(OH)) or lead(II) oxide (PbO) is encountered in practice where lead hydroxide is expected. This has been a subject of considerable confusion in the past.