Lutetium(III) oxide
Chemical compound
From Wikipedia, the free encyclopedia
Lutetium(III) oxide, a white solid, is a cubic compound of lutetium sometimes used in the preparation of specialty glasses. It is also called lutecia. It is a lanthanide oxide, also known as a rare earth.[2][3][4]
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| Names | |
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| Other names
Lutetium oxide, Lutetium sesquioxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.591 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Lu2O3 | |
| Molar mass | 397.932 g/mol |
| Melting point | 2,490 °C (4,510 °F; 2,760 K) |
| Boiling point | 3,980 °C (7,200 °F; 4,250 K) |
| Solubility in other solvents | Insoluble |
| Band gap | 5.5 eV[1] |
| Structure | |
| Bixbyite | |
| Ia3 (No. 206) | |
| Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
448.9 kcal/mol |
Gibbs free energy (ΔfG⦵) |
427.5 kcal/mol |
| Related compounds | |
Other anions |
Lutetium(III) chloride |
Other cations |
Scandium(III) oxide Yttrium(III) oxide |
| Supplementary data page | |
| Lutetium(III) oxide (data page) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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History
In 1879, Swiss chemist Jean Charles Galissard de Marignac (1817–1894) claimed to have discovered ytterbium, but he had found a mixture of elements. In 1907, French chemist Georges Urbain (1872–1938) reported that ytterbium was a mixture of two new elements and was not a single element. Two other chemists, Carl Auer von Welsbach (1858–1929) and Charles James (1880–1926) also extracted lutetium(III) oxide around the same time. All three scientists successfully separated Marignac's ytterbia into oxides of two elements which were eventually named ytterbium and lutetium). None of these chemists were able to isolate pure lutetium. James' separation was of very high quality, but Urbain and Auer von Welsbach published before him.[5][6]