Yttrium(III) oxide
Yttrium oxide is Y2O3. It is an air-stable, white solid substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds.
| Yttrium(III) oxide | |
|---|---|
| |
| IUPAC name | Yttrium(III) oxide. |
| Other names | Yttria, diyttrium trioxide, yttrium sesquioxide |
| Identifiers | |
| CAS number | |
| PubChem | |
| EC number | 215-233-5 |
| RTECS number | ZG3850000 |
| SMILES | O=[Y]O[Y]=O |
| Properties | |
| Molecular formula | Y2O3 |
| Molar mass | 225.81 g/mol |
| Appearance | White solid. |
| Density | 5.010 g/cm3, solid |
| Melting point |
2425 °C, 2698 K, 4397 °F |
| Boiling point | |
| Solubility in water | insoluble |
| Solubility in alcohol acid |
soluble |
| Structure | |
| Crystal structure | Cubic (bixbyite), cI80[1] |
| Space group | Ia-3, No. 206 |
| Coordination geometry |
Octahedral |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-1905.310 kJ/mol |
| Standard molar entropy S |
99.08 J/mol·K |
| Hazards | |
| EU classification | None listed. |
| R-phrases | Not hazardous |
| S-phrases | Template:S24/25 |
| Related compounds | |
| Other cations | Scandium(III) oxide, Lanthanum(III) oxide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
References
- ↑ Yong-Nian Xu; Zhong-quan Gu; W. Y. Ching (1997). "Electronic, structural, and optical properties of crystalline yttria". Phys. Rev. B56 (23): 14993–15000. Bibcode:1997PhRvB..5614993X. doi:10.1103/PhysRevB.56.14993.
Other websites
- Yttrium oxide information at Webelements.
- External MSDS Data Sheet Archived 2006-07-18 at the Wayback Machine.
