Gallium(I) oxide

Gallium(I) oxide

Names
Other names gallium suboxide digallium monoxide
Identifiers
CAS Number	12024-20-3  Y
3D model (JSmol)	Interactive image
ChemSpider	34990294  Y
PubChem CID	16702109
UNII	EJS6TG9SIN  Y
CompTox Dashboard (EPA)	DTXSID70152747
InChI InChI=1S/2Ga.O Key: KXACIVYKDCQNQA-UHFFFAOYSA-N
SMILES O([Ga])[Ga]
Properties
Chemical formula	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)
Magnetic susceptibility (χ)	−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). Infobox references

Gallium(I) oxide, digallium monoxide or gallium suboxide is an inorganic compound with the formula Ga₂ O.

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. Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, Florida: CRC Press. p. 4.64. ISBN   1-4398-5511-0.
2. Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, Florida: CRC Press. p. 4.133. ISBN   1-4398-5511-0.
3. Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, Florida: CRC Press. p. 5.12. ISBN   1-4398-5511-0.
4. Brauer, Georg (1975). Handbuch der Präparativen Anorganischen Chemie. Vol. 3. F. Enke. p. 857. ISBN   3-432-02328-6.
5. Emeléus, H. J. and Sharpe, A. G. (1963). Advances in Inorganic Chemistry and Radiochemistry. Vol. 5. Academic Press. p. 94. ISBN   008057854-3.
6. Siffert, Paul and Krimmel, Eberhard (2004). Silicon: Evolution and Future of a Technology. Springer. p. 439. ISBN   354040546-1.
7. Chou, L. -J (2007). Nanoscale One-dimensional Electronic and Photonic Devices (NODEPD). The Electrochemical Society. p. 47. ISBN   978-156677574-8.