{{chembox | Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 476993585 | Name = Gallium(III) iodide | ImageFile = Gallium-iodide-3D-balls.png | ImageFile1 = Gallium-iodide-3D-vdW.png | ImageName = Gallium(III) iodide | OtherNames = gallium triiodide | IUPACName = | SystematicName = | Section1 = {{Chembox Identifiers | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 75316 | EINECS = 236-611-6 | InChI = 1/Ga.3HI/h;3*1H/q+3;;;/p-3 | InChIKey = DWRNSCDYNYYYHT-DFZHHIFOAW | SMILES = I[Ga](I)I | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/Ga.3HI/h;3*1H/q+3;;;/p-3 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = DWRNSCDYNYYYHT-UHFFFAOYSA-K | CASNo_Ref = {{cascite|changed|??}} | CASNo = 13450-91-4 | PubChem = 83478 }} | Section2 = {{Chembox Properties | Formula = GaI<sub>3</sub> | MolarMass = 450.436 g/mol | Appearance = light yellow powder | Density = 4.5 g/cm<sup>3</sup><ref name=crc>Haynes, p. 4.63</ref> | Solubility = decomposes | MeltingPtC = 212 | MeltingPt_ref = <ref name=crc/> | BoilingPtC = 340 | BoilingPt_ref = <ref name=crc/> | MagSus = −149.0·10<sup>−6</sup> cm<sup>3</sup>/mol }} | Section4 = {{Chembox Thermochemistry | Thermochemistry_ref = <ref>Haynes, p. 5.20</ref> | DeltaGf = | DeltaHc = | DeltaHf = −238.9 kJ/mol | Entropy = 205.0 J/(mol·K) | HeatCapacity = 100 J/(mol·K) }} | Section5 = | Section6 = | Section7 = {{Chembox Hazards | GHSPictograms = {{GHS05}}{{GHS07}}{{GHS08}} | GHSSignalWord = Danger | HPhrases = {{H-phrases|314|317|334|335|361}} | PPhrases = {{P-phrases|280|305+351+338|310}} | NFPA-H = 4 | NFPA-R = 1 | NFPA-F = 0 }} }}
'''Gallium(III) iodide''' is the inorganic compound with the formula GaI<sub>3</sub>. A yellow hygroscopic solid, it is the most common iodide of gallium.<ref>{{cite book|author=Donges, E. |chapter=Gallium(III) Iodide|title=Handbook of Preparative Inorganic Chemistry, 2nd Ed. |editor=Brauer, G. |publisher=Academic Press|year=1963|place=NY, NY|volume=1|pages=846}}</ref> In the chemical vapor transport method of growing crystals of gallium arsenide uses iodine as the transport agent. In the solid state, it exists as the dimer Ga<sub>2</sub>I<sub>6</sub>, with a diborane structure.<ref>{{cite journal|doi=10.1002/zaac.200600008|title=Chemischer Transport fester Lösungen. 27. Mischphasenbildung und chemischer Transport im System Zn ''Se''/Ga ''As''|year=2006|last1=Brünig|first1= C.|last2=Locmelis|first2=S.|last3=Milke|first3=E.| last4=Binnewies|first4=M.|journal=Zeitschrift für Anorganische und Allgemeine Chemie|volume=632|issue=6|pages=1067–1072}}</ref> When vaporized, its forms GaI<sub>3</sub> molecules of D<sub>3h</sub> symmetry where the Ga–I distance is 2.458 Angstroms.<ref>Haynes, p. 9.23</ref>
Gallium triiodide can be reduced with gallium metal to give a green-colored gallium(I) iodide. The nature of this species is unclear, but it is useful for the preparation of gallium(I) and gallium(II) compounds.<ref>{{cite journal|doi=10.1039/b501310k|title="GaI": A versatile reagent for the synthetic chemist |year=2005 |last1=Baker |first1=Robert J. |last2=Jones |first2=Cameron |journal=Dalton Trans |issue=8 |pages=1341–1348 |pmid=15824768 |hdl=2262/69572 |hdl-access=free }}</ref><ref>{{cite journal|doi=10.1039/b613669a|title='GaI': A new reagent for chemo- and diastereoselective C–C bond forming reactions |year=2007 |last1=Green |first1=Shaun P. |last2=Jones |first2=Cameron |last3=Stasch |first3=Andreas |last4=Rose |first4=Richard P. |journal=New J. Chem. |volume=31 |pages=127–134 }}</ref>
==See also== *Gallium halides
==References== {{reflist}}
==Cited sources== *{{cite book |ref=Haynes| editor= Haynes, William M. | date = 2016| title = CRC Handbook of Chemistry and Physics | edition = 97th | publisher = CRC Press | isbn = 9781498754293}}
{{Gallium compounds}} {{Iodides}}
Category:Iodides Category:Gallium compounds Category:Metal halides
{{Metal-halide-stub}}