# Gallium(I) oxide

Gallium(I) oxide
Names
Other names
gallium suboxide
digallium monoxide
Identifiers
3D model (JSmol)
ChemSpider
Properties
Ga2O
Molar mass 155.445 g/mol[1]
Appearance brown powder[1]
Density 4.77 g/cm3[1]
Melting point >800 °C [1] (decomposes)
-34·10−6 cm3/mol[2]
Thermochemistry
−356.2 kJ/mol[3]
Hazards
not listed
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Gallium(I) oxide, digallium monoxide or gallium suboxide is an inorganic compound with the formula Ga2O.

## Production

Gallium(I) oxide can be produced by reacting gallium(III) oxide with heated gallium in vacuum:[4]

${\displaystyle \mathrm {Ga_{2}O_{3}+4\ Ga\longrightarrow 3\ Ga_{2}O} }$

It can also be obtained by reacting gallium with carbon dioxide in vacuum at 850 °C.[5]

${\displaystyle \mathrm {2\ Ga+CO_{2}\longrightarrow Ga_{2}O+CO} }$

Gallium(I) oxide is a by-product in the production of gallium arsenide wafers:[6][7]

${\displaystyle \mathrm {4\ Ga+SiO_{2}\longrightarrow 2\ Ga_{2}O+Si} }$

## 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]

## References

1. ^ a b c d Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.64. ISBN 1439855110.
2. ^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.133. ISBN 1439855110.
3. ^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 5.12. ISBN 1439855110.
4. ^ a b Brauer, Georg (1975). Handbuch der Präparativen Anorganischen Chemie. 3. p. 857. ISBN 3-432-02328-6.
5. ^ Emeléus, H. J. and Sharpe, A. G. (1963). Advances in Inorganic Chemistry and Radiochemistry. 5. Academic Press. p. 94. ISBN 008057854-3.CS1 maint: Multiple names: authors list (link)
6. ^ Siffert, Paul and Krimmel, Eberhard (2004). Silicon: Evolution and Future of a Technology. Springer. p. 439. ISBN 354040546-1.CS1 maint: Multiple names: authors list (link)
7. ^ Chou, L. -J (2007). Nanoscale One-dimensional Electronic and Photonic Devices (NODEPD). The Electrochemical Society. p. 47. ISBN 156677574-4.