Names | |
---|---|
IUPAC name terbium(III) oxide | |
Other names terbium trioxide, terbia, terbium sesquioxide | |
Identifiers | |
CAS Number | |
3D model (JSmol) | |
ECHA InfoCard | 100.031.668 |
EC Number |
|
PubChem CID | |
CompTox Dashboard (EPA) | |
InChI
| |
SMILES
| |
Properties | |
Chemical formula | O3Tb2 |
Molar mass | 365.848 g·mol−1 |
Appearance | white crystals |
Density | 7.91 g/cm3 |
Melting point | 2,410 °C (4,370 °F; 2,680 K) |
Magnetic susceptibility (χ) | 0.07834 cm3/mol |
Structure | |
Crystal structure | Cubic, cI80 |
Space group | Ia3, No. 206 |
Lattice constant | a = 1.057 nm |
Thermochemistry | |
Std molar entropy (S⦵298) |
156.90 J/mol·K |
Std enthalpy of formation (ΔfH⦵298) |
-1865.23 kJ/mol |
Gibbs free energy (ΔfG⦵) | -1776.553 kJ/mol |
Hazards | |
GHS labelling: | |
Pictograms | |
Signal word | Warning |
Hazard statements | H319, H410 |
Precautionary statements | P264, P273, P280, P305+P351+P338, P337+P313, P391, P501 |
Related compounds | |
Other anions | Terbium(III) chloride |
Other cations | Gadolinium(III) oxide Dysprosium(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Y verify (what is YN ?) Infobox references |
Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb
2O
3. It is a p-type semiconductor, which conducts protons, which is enhanced when doped with calcium. It may be prepared by the reduction of Tb
4O
7 in hydrogen at 1300 °C for 24 hours.
It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed.
Tb2O3 + 6 H+ → 2 Tb3+ + 3 H2OThe crystal structure is cubic and the lattice constant is a = 1057 pm.
Terbium compounds | |
---|---|
Terbium(III) | |
Terbium(III,IV) | |
Terbium(IV) |
This inorganic compound–related article is a stub. You can help Wikipedia by expanding it. |