Yttrium(III) oxide
| Names | |
|---|---|
| IUPAC name
Yttrium(III) oxide. | |
| Other names
Yttria, diyttrium trioxide, yttrium sesquioxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.849 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Y2O3 | |
| Molar mass | 225.81 g/mol |
| Appearance | White solid. |
| Density | 5.010 g/cm3, solid |
| Melting point | 2,425 °C (4,397 °F; 2,698 K) |
| Boiling point | 4,300 °C (7,770 °F; 4,570 K) |
| insoluble | |
| +44.4·10−6 cm3/mol | |
| Structure | |
| Cubic (bixbyite), cI80 | |
| Ia3 (No. 206) | |
| Octahedral | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
99.08 J/mol·K |
Std enthalpy of formation (ΔfH⦵298) |
−1905.310 kJ/mol |
Gibbs free energy (ΔfG⦵) |
−1816.609 kJ/mol |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LDLo (lowest published) |
>10,000 mg/kg (rat, oral) >6000 mg/kg (mouse, oral) |
| Related compounds | |
Other anions |
Yttrium(III) sulfide |
Other cations |
Scandium(III) oxide, Lutetium(III) oxide |
Related compounds |
Yttrium barium copper oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Yttrium oxide, also known as yttria, is Y2O3. It is an air-stable, white solid substance.
The thermal conductivity of yttrium oxide is 27 W/(m·K).