Thorium dioxide
Compounds
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Thorium dioxide, also called thorium(IV) oxide, is a crystalline solid, often white or yellow in colour. Also known as thoria, it is mainly a by-product of lanthanide and uranium production. Thorianite is the name of the mineralogical form of... Wikipedia
Formula: ThO2
Molar mass: 264.04 g/mol
Melting point: 6,134°F (3,390°C)
Density: 10 g/cm³
Boiling point: 7,952°F (4,400°C)
Solubility: insoluble in alkali; slightly soluble in acid
Coordination geometry: Tetrahedral (O2−); cubic (ThIV)