Terbia

Terbium(III) oxide
Names

IUPAC name terbium(III) oxide
Other names terbium trioxide, terbia, terbium sesquioxide
Identifiers
CAS Number	12036-41-8^Y
3D model (Jmol)	Interactive image
ECHA InfoCard	100.031.668
EC Number	234-849-5
PubChem CID	159410
InChI InChI=1/3O.2Tb/q3-2;2+3
SMILES [O-2].[O-2].[O-2].[Tb+3].[Tb+3]
Properties
Chemical formula	O₃Tb₂
Molar mass	365.85 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	Ia-3, No. 206
Thermochemistry
Std molar entropy (S^o₂₉₈)	156.90 J/mol·K
Std enthalpy of formation (Δ_fH^o₂₉₈)	-186.523 kJ/mol
Gibbs free energy (Δ_fG˚)	-177.6553 kJ/mol
Hazards
EU classification (DSD)	not listed
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 [77 °F], 100 kPa).
Y (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 when doped with calcium, and may be prepared by the reduction of Tb
4O
7 in hydrogen at 1300 °C for 24 hours.

It is a p-type semiconductor.

It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed.

The crystal structure is cubic and the lattice constant is a = 1057 pm.

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