| 词条 | Gallium(II) sulfide |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 428786766 | ImageFile = GaSstructure.jpg | ImageFile_Ref = {{chemboximage|correct|??}} | ImageName = Ball and stick, cell model of gallium(II) sulfide | OtherNames = Gallium sulfide{{Citation needed|date = September 2011}} |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 12024-10-1 | PubChem = 6370242 | ChemSpiderID = 4898760 | ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | SMILES = S=[Ga] | StdInChI = 1S/Ga.S | StdInChI_Ref = {{stdinchicite|changed|chemspider}} | StdInChIKey = HLVRMBHKGAMNOI-UHFFFAOYSA-N | StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} }} |Section2={{Chembox Properties | Formula = GaS• | MolarMass = 101.788 g mol−1 | Appearance = Yellow crystals | Density = 3.86 g cm−3 | MeltingPtC = 965 | MagSus = −-23.0·10−6 cm3/mol }} |Section3={{Chembox Structure | CrystalStruct = hexagonal, hP8 | SpaceGroup = P63/mmc, No. 194 }} |Section8={{Chembox Related | OtherCompounds = Gallium(III) sulfide }} }}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.[1] This layer structure is similar to GaTe, GaSe and InSe.[1] An unusual metastable form, with a distorted wurtzite structure has been reported as being produced using MOCVD. The metal organic precursors were di-tert-butyl gallium dithiocarbamates, for example GatBu2(S2CNMe2) and this was deposited onto GaAs. The structure of the GaS produced in this way is presumably Ga2+ S2−.[2] Single layers of gallium sulfide are dynamically stable two-dimensional semiconductors, in which the valence band has an inverted Mexican-hat shape, leading to a Lifshitz transition as the hole-doping is increased.[3] ReferencesWebElements1. ^1 {{Greenwood&Earnshaw}} {{Gallium compounds}}{{Sulfides}}{{inorganic-compound-stub}}2. ^ MOCVD Growth of Gallium Sulfide Using Di-tert-butyl Gallium Dithiocarbamate Precursors: Formation of a Metastable Phase of GaS A. Keys, S G. Bott, A. R. Barron Chem. Mater., 11 (12), 3578 -3587, 1999. {{doi|10.1021/cm9903632}} 3. ^{{cite journal|author= V. Zolyomi, N. D. Drummond and V. I. Fal'ko|title= Band structure and optical transitions in atomic layers of hexagonal gallium chalcogenides|journal= Phys. Rev. B |volume= 87 |pages= 195403 |year=2013|doi= 10.1103/PhysRevB.87.195403|arxiv= 1302.6067|bibcode= 2013PhRvB..87s5403Z}} 3 : Sulfides|Gallium compounds|Inorganic compound stubs |
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