Gallium(I) oxide can be produced by reacting gallium(III) oxide with heated gallium in vacuum:1
It can also be obtained by reacting gallium with carbon dioxide in vacuum at 850 °C.2
Gallium(I) oxide is a by-product in the production of gallium arsenide wafers:34
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).5
Brauer, Georg (1975). Handbuch der Präparativen Anorganischen Chemie. Vol. 3. F. Enke. p. 857. ISBN 3-432-02328-6. 3-432-02328-6 ↩
Emeléus, H. J. and Sharpe, A. G. (1963). Advances in Inorganic Chemistry and Radiochemistry. Vol. 5. Academic Press. p. 94. ISBN 008057854-3.{{cite book}}: CS1 maint: multiple names: authors list (link) 008057854-3 ↩
Siffert, Paul and Krimmel, Eberhard (2004). Silicon: Evolution and Future of a Technology. Springer. p. 439. ISBN 354040546-1.{{cite book}}: CS1 maint: multiple names: authors list (link) 354040546-1 ↩
Chou, L. -J (2007). Nanoscale One-dimensional Electronic and Photonic Devices (NODEPD). The Electrochemical Society. p. 47. ISBN 978-156677574-8. 978-156677574-8 ↩