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| Names | |
|---|---|
| IUPAC name Ytterbium(III) oxide. | |
| Other names Ytterbia diytterbium trioxide ytterbium sesquioxide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.013.850 |
| EC Number |
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| UNII | |
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| Properties | |
| Yb2O3 | |
| Molar mass | 394.08 g/mol |
| Appearance | White solid. |
| Density | 9.17 g/cm3, solid. |
| Melting point | 2,355 °C (4,271 °F; 2,628 K) |
| Boiling point | 4,070 °C (7,360 °F; 4,340 K) |
| Insoluble | |
| Structure | |
| Cubic, cI80 | |
| Ia-3, No. 206 | |
| Octahedral | |
| Thermochemistry | |
Std molar entropy(S⦵298) | 133.05 J/mol·K[1] |
Std enthalpy of formation(ΔfH⦵298) | −1814.600 kJ/mol[1] |
Gibbs free energy(ΔfG⦵) | −1726.844 kJ/mol[1] |
| Hazards | |
| GHS labelling: | |
 | |
| Warning | |
| H315,H319,H335 | |
| P261,P305+P351+P338[2] | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable. |
| Related compounds | |
Otheranions | Ytterbium(III) sulfide,Ytterbium(III) chloride |
Othercations | Thulium(III) oxide Lutetium(III) oxide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Ytterbium(III) oxide is the chemical compound with the formula Yb2O3. It is one of the more commonly encountered compounds ofytterbium. It occurs naturally in trace amounts in the mineralgadolinite. It was first isolated from this in 1878 byJean Charles Galissard de Marignac.[3]
Ytterbium(III) oxide can be obtained by directly reacting ytterbium withoxygen:[4]
It can also be obtained by the thermal decomposition of ytterbium carbonate or ytterbium oxalate at temperatures around 700 °C:[5]
Ytterbium(III) oxide is a white powder.[2] It reacts withcarbon tetrachloride[6] or hothydrochloric acid to formytterbium(III) chloride:[7]
Like the other trivalent oxides of the heavier lanthanides, ytterbium(III) oxide has the "rare-earth C-type sesquioxide" structure which is related to the fluorite structure with one quarter of the anions removed, leading to ytterbium atoms in two different six coordinate (non-octahedral) environments.[8]
