Gallium(III) sulfide
Names | |
---|---|
Other names
gallium sesquisulfide
| |
Identifiers | |
3D model (
JSmol ) |
|
ECHA InfoCard
|
100.031.526 |
EC Number |
|
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
Ga2S3 | |
Molar mass | 235.644 g/mol |
Appearance | yellow (α-) |
Density | 3.77 g/cm3 [1] |
Melting point | 1,090 °C (1,990 °F; 1,360 K)[1] |
Reacts[2] | |
−-80·10−6 cm3/mol | |
Related compounds | |
Related compounds
|
Gallium(II) sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Gallium(III) sulfide, Ga2S3, is a compound of sulfur and gallium, that is a semiconductor that has applications in electronics and photonics.
Structure
There are four
Preparation and chemical properties
Ga2S3 can prepared by reacting the elements at high temperature or as a white solid by heating Ga in a stream of H2S at high temperature (950 °C).[2]
It may also prepared by a solid state reaction of GaCl3 and Na2S.[5]
The method of production can determine the polymorphic form produced, the reaction of
Ga2S3 decomposes at high temperature forming the non-stoichiometric sulfide, Ga4Sx (4.8 < x < 5.2).[5] Ga2S3 dissolves in aqueous acids and decomposes slowly in moist air forming H2S.[2]
Ga2S3 dissolves in aqueous solutions of potassium sulfide, K2S to form K8Ga4S10 containing the (Ga4S10)8− anion which has an adamantane, molecular P4O10 structure.[5]
Ternary sulfides MIGaS2, MIIGa2S4 and MIIIGaS3 respectively have been of interest due to their unusual electrical properties and some of these can be prepared by reactions of Ga2S3 with metal sulfides e.g. CdGa2S4:-[5]
- Ga2S3 + CdS → CdGa2S4
Although by itself Ga2S3 is not a glass former it can be reacted with rare earth sulfides to form glasses e.g. the reaction with lanthanum sulfide, La2S3, forms gallium lanthanum sulfide glass which has interesting optical properties and is a semiconductor.[7]
References
- ^ ISBN 978-1-4398-1461-1
- ^ ISBN 978-0751401035
- ISSN 0022-4596.
- ISBN 978-1429218207.
- ^ ISBN 0-471-93620-0.
- ISBN 978-3540404880
- ISBN 9780080541068