Hydroxide minerals

Gibbsite, Al(OH)3, is one of the mineral forms of aluminium hydroxide.

Goethite (FeO(OH)), (pronunciation: /ˈɡɜːrtaɪt/ GUR-tite) named after the German polymath and poet Johann Wolfgang von Goethe (1749–1832), an iron bearing hydroxide mineral of the diaspore group, is found in soil and other low-temperature environments.

Boehmite or böhmite is an aluminium oxide hydroxide (γ-AlO(OH)) mineral, a component of the aluminium ore bauxite.

Limonite is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition.

Diaspore /ˈdaɪəspɔːr/, also known as diasporite, empholite, kayserite, or tanatarite, is an aluminium oxide hydroxide mineral, α-AlO(OH), crystallizing in the orthorhombic system and isomorphous with goethite.

Diaboleite is a blue-colored mineral with formula Pb2CuCl2(OH)4.

Lepidocrocite (γ-FeO(OH)), also called esmeraldite or hydrohematite, is an iron oxide-hydroxide mineral.

Birnessite (Na0.3Ca0.1K0.1)(Mn4+,Mn3+)2O4 · 1.

Dzhalindite is a rare indium hydroxide mineral discovered in Siberia.

Manganite is a mineral.

Portlandite is a rare oxide mineral.

Brucite is the mineral form of magnesium hydroxide, with the chemical formula Mg(OH)2.

Waterhouseite, Mn7(PO4)2(OH)8, is a hydroxy manganese phosphate mineral.

Putnisite is a mineral composed of strontium, calcium, chromium, sulfur, carbon, oxygen and hydrogen.

Ferronigerite-2N1S is an iron, tin, alumino-hydroxide mineral that naturally occurs around sillimanite-quartz veins.

Feroxyhyte is an oxide/hydroxide of iron, δ-Fe3+O(OH).

Ferrihydrite (Fh) is a widespread hydrous ferric oxyhydroxide mineral at the Earth's surface, and a likely constituent in extraterrestrial materials.

Spertiniite is a rare copper hydroxide mineral.

Sweetite has a general formula of Zn(OH)2.

Tarbuttite is a rare phosphate mineral with formula Zn2(PO4)(OH).

Tlalocite is a rare and complex tellurate mineral with the formula Cu10Zn6(TeO4)2(TeO3)(OH)25Cl · 27 H2O.

Tungstite is a hydrous tungsten oxide mineral with formula: WO3·H2O.

Caryopilite (synonymous with ectropite and ektropite) is a brown-colored mineral with formula (Mn2+,Mg)3Si2O5(OH)4.

Leucophoenicite is a mineral with formula Mn7(SiO4)3(OH)2.

Manganvesuvianite is a rare mineral with formula Ca19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9.

Serandite is a mineral with formula Na(Mn2+,Ca)2Si3O8(OH).

Sonolite is a mineral with formula Mn9(SiO4)4(OH,F)2.

Ekplexite is a unique sulfide-hydroxide niobium-rich mineral with the formula (Nb,Mo)S2•(Mg1−xAlx)(OH)2+x.

Fermiite is a rare uranium mineral with the formula Na4(UO2)(SO4)3·3H2O.