Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb
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
7 in hydrogen at 1300 °C for 24 hours.
terbium trioxide, terbia, terbium sesquioxide
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||365.848 g·mol−1|
|Melting point||2,410 °C (4,370 °F; 2,680 K)|
|Ia3, No. 206|
a = 1.057 nm
|156.90 J/mol·K |
Std enthalpy of
|-1865.23 kJ/mol |
Gibbs free energy (ΔfG˚)
|-1776.553 kJ/mol |
|P264, P273, P280, P305+P351+P338, P337+P313, P391, P501|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
(what is ?)
It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed.