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{{chembox |
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{{chembox |
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| Watchedfields = changed |
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| verifiedrevid = 388559792 |
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| verifiedrevid = 437209378 |
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| Name = Gold(I) sulfide |
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| ImageFile = Gold(I)-sulfide-xtal-1995-unit-cell-CM-3D-balls.png |
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| Name = Gold(I) sulfide |
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| ImageFile = Gold(I)-sulfide-xtal-1995-unit-cell-CM-3D-balls.png |
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| ImageSize = 150px |
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| ImageSize = 150px |
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| ImageName = Gold(I) sulfide unit cell |
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| ImageName = Gold(I) sulfide unit cell |
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| IUPACName = Gold(I) sulfide |
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| IUPACName = Gold(I) sulfide |
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| OtherNames = |
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| OtherNames = Aurous sulfide |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = |
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| ChemSpiderID = 14028556 |
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| InChI = |
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| InChI = 1S/2Au.S/q2*+1;-2 |
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| SMILES = |
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| SMILES = .. |
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| InChIKey = |
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| InChIKey = YVIYNOINIIHOCG-UHFFFAOYSA-N |
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| CASNo_Ref = {{cascite|correct|??}} |
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| CASNo = 1303-60-2 |
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| CASNo = 1303-60-2 |
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| PubChem = |
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| PubChem = 22904715 |
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| RTECS = |
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| RTECS = |
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| EINECS = |
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| EINECS = 215-123-7 |
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| UNII = 03VC3O9F7W |
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}} |
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}} |
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| Section2 = {{Chembox Properties |
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|Section2={{Chembox Properties |
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| Formula = Au<sub>2</sub>S |
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| Formula = {{chem2|Au2S}} |
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| MolarMass = 426.00 g/mol |
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| MolarMass = 425.998 g/mol |
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| Appearance = |
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| Appearance = |
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| Density = 11 g/cm<sup>3</sup><ref name="hic">{{cite book |editor1-last=Perry |editor1-first=Dale |title=Handbook of Inorganic Compounds |date=1995 |isbn=9780849386718 |page=184 |language=English}}</ref> |
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| Density = |
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| Solubility = Insoluble |
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| Solubility = Insoluble |
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| SolubleOther = |
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| SolubleOther = |
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| Solvent = |
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| Solvent = |
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| MeltingPtC = |
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| MeltingPtC = 240 |
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| BoilingPtC = |
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| BoilingPtC = |
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| BandGap = |
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| BandGap = |
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}} |
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}} |
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| Section3 = {{Chembox Structure |
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|Section3={{Chembox Structure |
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| Coordination = |
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| Coordination = |
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| CrystalStruct = |
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| CrystalStruct = |
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}} |
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| Section7 = {{Chembox Hazards |
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|Section7={{Chembox Hazards |
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| ExternalMSDS = |
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| ExternalSDS = |
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| EUIndex = |
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| NFPA-H = |
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| EUClass = |
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| NFPA-F = |
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| NFPA-H = |
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| NFPA-R = |
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| NFPA-F = |
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| NFPA-R = |
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| RPhrases = |
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| SPhrases = |
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}} |
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| Section8 = {{Chembox Related |
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|Section8={{Chembox Related |
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| OtherAnions = ] |
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| OtherAnions = ] |
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| OtherCations = |
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| OtherCations = |
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'''Gold(I) sulfide''' is the ] with the formula Au<sub>2</sub>S. It is one of two principal ]s of ]. Gold sulfides exist in nature as solid solutions with silver, which has the same covalent radius. |
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'''Gold(I) sulfide''' is the ] with the formula {{chem2|Au2S}}. It is the principal ] of ]. It decomposes to gold metal and elemental sulfur, illustrating the "nobility" of gold. |
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==Structure and preparation== |
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==Structure and preparation== |
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The compound crystallizes in the motif seen for ]: gold is 2-coordinate, sulfur four coordinate, and the S-Au-S linkage is linear.<ref>Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.</ref> Linear coordination geometry is typically adopted by gold(I) compounds, such as the ] ]. |
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The compound crystallizes in the motif seen for ]: gold is 2-coordinate, sulfur 4-coordinate, and the S-Au-S linkage is linear.<ref>Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. {{ISBN|0-19-855370-6}}.</ref> Linear coordination geometry is typical of gold(I) compounds, e.g. the ] ]. The structure is similar to the α form of ] (]), which only exists at high temperatures.<ref name="Ishikawa" /> |
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It can be prepared by treating gold chloride with ]<ref>N. N. Greenwood, A. Earnshaw, ''Chemistry of the Elements'', 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.</ref> It also arises by treating dicyanoaurate: |
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It can be prepared by treating gold chloride with ]<ref>N. N. Greenwood, A. Earnshaw, ''Chemistry of the Elements'', 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.</ref> It also arises by sulfiding ]: |
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:H<sub>2</sub>S + 2 KAu(CN)<sub>2</sub> → Au<sub>2</sub>S + 2 KCN + 2 HCN |
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:{{chem2|H2S + 2 K → Au2S + 2 ] + 2 ]}} |
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This product is described as "initially dark reddish-brown" solid that turns "steel-gray.”<ref>Marjorie O. Faltens and D. A. Shirley “Moessbauer spectroscopy of gold compounds” Journal of Chemical Physics (1970, volume 53, (11), 4249-64. {{doi|10.1063/1.1673931}}</ref> |
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This product is described as "initially dark reddish-brown" solid that turns "steel-gray".<ref>{{cite journal|doi=10.1063/1.1673931|title=Mössbauer Spectroscopy of Gold Compounds|year=1970|last1=Faltens|first1=Marjorie O.|journal=The Journal of Chemical Physics|volume=53|issue=11|pages=4249–4264|bibcode=1970JChPh..53.4249F}}</ref><ref name="Ishikawa">{{cite journal|doi=10.1016/0167-2738(95)00030-A|title=Structure and Electrical Properties of Au<sub>2</sub>S|journal=Solid State Ionics|volume=79|pages=60–66|year=1995|last1=Ishikawa|first1=K.}}</ref> |
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==References== |
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==References== |
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{{reflist}} |
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<references/> |
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{{Gold compounds}} |
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{{Gold compounds}} |
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{{Sulfides}} |
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] |
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] |
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] |
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] |
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] |
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] |
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