Compounds {oxide mineral} with oxygen vary. Oxides include bauxite, spinel, magnetite, chromite, corundum, cuprite, zincite, hematite, rutile, cassiterite, and uraninite.
BaSO4 [4 is subscript] {barite} is main barium ore.
SnO2 [2 is subscript] {cassiterite} is main tin ore.
TiO2 [2 is subscript] {rutile} has titanium and is semiconductor. It can catalyze water to oxygen and hydrogen under ultraviolet light {photolysis}, and organic molecules to carbon dioxide and water under ultraviolet light, by making superoxide and hydroxyl radicals. Titania thin films make things wettable {wettability} and so self-cleaning.
Aluminum or iron oxides can form rocks {spinel} that have no cleavage.
UO2 [2 is subscript] {uraninite} has uranium.
Manganese oxide can be in hydrous ore {wad}.
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Date Modified: 2022.0225