Terbium oxide include terbium sesquioxide and tetraterbium heptaoxide. Terbium sesquioxide is dark brown powder, however tetraterbium heptaoxide is sepia powder. Common oxides of terbium is tetraterbium heptaoxide. 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.:12036-41-8 | EINECS No.:234-849-5 | Molecular Formula:Tb2O3 | Molecular Weight:365.85 |
| Melting Point:2200 |
| CAS No.:12037-01-3 | EINECS No.:234-856-3 | Molecular Formula:Tb4O7 | Molecular Weight:747.69 |
| Melting Point:2337℃ | Density:8.33 |
Applications
Tetraterbium heptaoxide 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.