Thulium(III) oxide

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Thulium(III) oxide
Thulium(III) oxide
CAS number 12036-44-1 YesY
PubChem 159411
Jmol-3D images Image 1
Molecular formula Tm2O3
Molar mass 385.866 g/mol
Appearance greenish-white cubic crystals
Density 8.6 g/cm3
Melting point 2,341 °C (4,246 °F; 2,614 K)
Boiling point 3,945 °C (7,133 °F; 4,218 K)
Solubility in water slightly soluble in acids
Crystal structure Cubic, cI80
Space group Ia-3, No. 206
Related compounds
Other anions Thulium(III) chloride
Other cations Erbium(III) oxide
Ytterbium(III) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Thulium (III) oxide is a pale green solid compound, with the formula Tm2O3. It was first isolated in 1878 from an impure sample of erbia by Per Teodor Cleve, who named it thulia. It can be prepared in the laboratory by burning thulium metal in air, or by decomposition of their oxoacid salts, such as thulium nitrate. [1]


  1. ^ Catherine E. Housecroft; Alan G. Sharpe (2008). "Chapter 25: The f-block metals: lanthanoids and actinoids". Inorganic Chemistry, 3rd Edition. Pearson. p. 864. ISBN 978-0-13-175553-6.