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Terbium Oxide

Terbium oxide include terbium(III) oxide and terbium(III,IV) oxide. Terbium(III) oxide is dark brown powder, however terbium(III, IV) oxide is sepia powder. Common oxide of terbium is terbium(III, IV) oxide. Tb2O3 is insoluble in water, however soluble in mineral acid. Tb4O7 is easily soluble in acid, however not soluble in water.

Terbium Oxide

CAS No.:12036-41-8EINECS No.:234-849-5Molecular Formula:Tb2O3Molecular Weight:365.85
Melting Point:2200   
CAS No.:12037-01-3EINECS No.:234-856-3Molecular Formula:Tb4O7Molecular Weight:747.69
Melting Point:2337℃Density:8.33  


Terbium(III, IV) oxide is additive for yttrium iron garnet and yttrium aluminium garnet. It is raw material for production of terbium metal. It also acts as activator of fluorescent powder, which is fluorophor of X-ray intensifying screen. Tb4O7 is additive for magnetic material and fluorescent powder too.