Misplaced Pages

Terbium(III) oxide

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
(Redirected from Terbia)
Terbium(III) oxide
Names
IUPAC name terbium(III) oxide
Other names terbium trioxide, terbia, terbium sesquioxide
Identifiers
CAS Number
3D model (JSmol)
ECHA InfoCard 100.031.668 Edit this at Wikidata
EC Number
  • 234-849-5
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1/3O.2Tb/q3*-2;2*+3
SMILES
  • ....
Properties
Chemical formula O3Tb2
Molar mass 365.848 g·mol
Appearance white crystals
Density 7.91 g/cm
Melting point 2,410 °C (4,370 °F; 2,680 K)
Magnetic susceptibility (χ) 0.07834 cm/mol
Structure
Crystal structure Cubic, cI80
Space group Ia3, No. 206
Lattice constant a = 1.057 nm
Thermochemistry
Std molar
entropy (S298) 		156.90 J/mol·K
Std enthalpy of
formation (ΔfH298) 		-1865.23 kJ/mol
Gibbs free energy (ΔfG) -1776.553 kJ/mol
Hazards
GHS labelling:
Pictograms GHS07: Exclamation markGHS09: Environmental hazard
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). checkY verify (what is  ?) Infobox references
Chemical compound

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.

Tb4O7 + H2 → 2 Tb2O3 + H2O

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

Tb2O3 + 6 H → 2 Tb + 3 H2O

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

References

  1. Curzon A.E.; Chlebek H.G. (1973). "The observation of face centred cubic Gd, Tb, Dy, Ho, Er and Tm in the form of thin films and their oxidation". J. Phys. F. 3 (1): 1–5. Bibcode:1973JPhF....3....1C. doi:10.1088/0305-4608/3/1/009.
  2. ^ R. Robie, B. Hemingway, and J. Fisher, "Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures," US Geol. Surv., vol. 1452, 1978.
  3. Reidar Haugsrud; Yngve Larring & Truls Norby (December 2005). "Proton conductivity of Ca-doped Tb
    2O
    3". Solid State Ionics. 176 (39–40). Elsevier B.V.: 2957–2961. doi:10.1016/j.ssi.2005.09.030.
  4. G. J. McCarthy (October 1971). "Crystal data on C-type terbium sesquioxide (Tb
    2O
    3)". Journal of Applied Crystallography. 4 (5): 399–400. doi:10.1107/S0021889871007295.
  5. N. C. Baenzinger, H. A. Eick, H. S. Schuldt, L. Eyring: Terbium Oxides. III. X-Ray Diffraction Studies of Several Stable Phases. In: Journal of the American Chemical Society, 1961, 83, 10, S. 2219-23.
Terbium compounds
Terbium(III)
Terbium(III,IV)
Terbium(IV)
Oxides
Mixed oxidation states
+1 oxidation state
+2 oxidation state
+3 oxidation state
+4 oxidation state
+5 oxidation state
+6 oxidation state
+7 oxidation state
+8 oxidation state
Related
Oxides are sorted by oxidation state. Category:Oxides


Stub icon

This inorganic compound–related article is a stub. You can help Misplaced Pages by expanding it.

Categories: