Gallium(I) oxide
Chemical compound
From Wikipedia, the free encyclopedia
Gallium(I) oxide, digallium monoxide or gallium suboxide is an inorganic compound with the formula Ga2O.
| Names | |
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| Other names
gallium suboxide digallium monoxide | |
| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Ga2O | |
| Molar mass | 155.445 g/mol[1] |
| Appearance | brown powder[1] |
| Density | 4.77 g/cm3[1] |
| Melting point | 800 °C (1,470 °F; 1,070 K)[1] (decomposes) |
| −34·10−6 cm3/mol[2] | |
| Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
−356.2 kJ/mol[3] |
| Related compounds | |
Other cations |
Boron monoxide Aluminium(I) oxide Indium(I) oxide Thallium(I) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production
Gallium(I) oxide can be produced by reacting gallium(III) oxide with heated gallium in vacuum:[4]
It can also be obtained by reacting gallium with carbon dioxide in vacuum at 850 °C.[5]
Gallium(I) oxide is a by-product in the production of gallium arsenide wafers:[6][7]
Properties
Gallium(I) oxide is a brown-black diamagnetic solid which is resistant to further oxidation in dry air. It starts decomposing upon heating at temperatures above 500 °C, and the decomposition rate depends on the atmosphere (vacuum, inert gas, air).[4]