Neodymium(III) oxide
Neodymium(III) oxide or neodymium sesquioxide is the chemical compound composed of neodymium and oxygen with the formula Nd2O3. It forms very light grayish-blue hexagonal crystals. The rare-earth mixture didymium, previously believed to be an element, partially consists of neodymium(III) oxide.
| Names | |
|---|---|
| IUPAC name
Neodymium(III) oxide | |
| Other names
Neodymium oxide, Neodymium sesquioxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.832 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Nd2O3 | |
| Molar mass | 336.48 g/mol |
| Appearance | light bluish gray hexagonal crystals |
| Density | 7.24 g/cm3 |
| Melting point | 2,233 °C (4,051 °F; 2,506 K) |
| Boiling point | 3,760 °C (6,800 °F; 4,030 K) |
| .0003 g/100 mL (75 °C) | |
| +10,200.0·10−6 cm3/mol | |
| Structure | |
| Hexagonal, hP5 | |
| P-3m1, No. 164 | |
| Thermochemistry | |
Heat capacity (C) |
111.3 J·mol−1·K−1 |
Std molar entropy (S⦵298) |
158.6 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−1807.9 kJ·mol−1 |
| Related compounds | |
Other anions |
Neodymium(II) chloride Neodymium(III) chloride |
Other cations |
Uranium(VI) oxide Praseodymium(III) oxide Promethium(III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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