Gallium(II) sulfide

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Gallium(II) sulfide
Other names	gallium sulfide
Identifiers
CAS number	[12024-10-1]
Properties
Molecular formula	GaS
Molar mass	101.789 g/mol
Appearance	yellow
Density	3.86 g/cm3, solid
Melting point	965°C
Hazards
EU classification	not listed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Gallium(II) sulfide, GaS, is a chemical compound of gallium and sulfur. The normal form of gallium(II) sulfide as made from the elements has a hexagonal layer structure containing Ga₂⁴⁺ units which have a Ga-Ga distance of 248pm. This layer structure is similar to GaTe and InSe. An unusual metastable form, with a distorted wurtzite, ZnS, structure has been reported as being produced using MOCVD. The metal organic precursors were di-tert-butyl gallium dithiocarbamates, for example Ga^tBu₂(S₂CNMe₂) and this was deposited onto GaAs. The structure of the GaS produced in this way is presumably Ga²⁺ S²⁻.^[1]

[edit] References

WebElements
Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements, 2nd Edition, Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.