查看“︁二硫化钨”︁的源代码

{{chembox
| verifiedrevid = 477004621
| ImageFile = Molybdenite-3D-balls.png
<!-- | ImageSize = 200px -->
|   ImageName = 
| IUPACName = Tungsten disulfide<br />Bis(sulfanylidene)tungsten
| SystematicName = Dithioxotungsten
|   OtherNames = 
| Section1 = {{Chembox Identifiers
|  CASNo = 12138-09-9
|  CASNo_Ref = {{cascite|correct|CAS}}
|  ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 30521
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/2S.W
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = ITRNXVSDJBHYNJ-UHFFFAOYSA-N
| PubChem = 82938
|  ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 74837
| InChI = 1S/2S.W
| InChIKey= ITRNXVSDJBHYNJ-UHFFFAOYSA-N 
| SMILES = S=[W]=S
| EINECS = 235-243-3
  }}
| Section2 = {{Chembox Properties
|   Formula = WS<sub>2</sub>
|   MolarMass = 247.98 g/mol
|   Appearance = 蓝灰色粉末<ref name=b1>{{cite book|author=Mary Eagleson|title=Concise encyclopedia chemistry|url=http://books.google.com/books?id=Owuv-c9L_IMC&pg=PA1129|accessdate=6 November 2011|year=1994|publisher=Walter de Gruyter|isbn=978-3-11-011451-5|page=1129|archive-date=2017-03-27|archive-url=https://web.archive.org/web/20170327181205/https://books.google.com/books?id=Owuv-c9L_IMC&pg=PA1129|dead-url=no}}</ref>
|   Density = 7.5 g/cm<sup>3</sup> 固态<ref name=b1/>
|   MeltingPt = 1250 °C 分解<ref name=b1/>
|   Solubility = 微溶
  }}
| Section3 = {{Chembox Structure
|   CrystalStruct = [[辉钼矿]]结构
|   Coordination = [[三棱柱]] (W<sup>IV</sup>)<br/>锥形 (S<sup>2−</sup>)
  }}
| Section7 = {{Chembox Hazards
|   ExternalMSDS = 
|   EUIndex = 未列出
|   EUClass = {{Chembox EUHazardSymbol|Xi}}
|   RPhrases = {{R36/37/38}}
|   SPhrases = {{S26}}-{{S37/39}}
|   NFPA-H = 
|   NFPA-F = 
|   NFPA-R = 
|   FlashPt = 
  }}
| Section8 = {{Chembox Related
|   OtherAnions = [[二氧化钨]]<br />[[二硒化钨]]
|   OtherCations = [[二硫化钼]]
|   OtherFunctn = 
|    Function = 
  }}
}}
'''二硫化钨'''是一种无机化合物，[[化学式]]为WS<sub>2</sub>。

==性质==
灰色有金属光泽的细小[[六方晶系]]结晶或粉末。在空气中稳定。不溶于水，溶于[[硝酸]]和[[氢氟酸]]混酸中。溶于熔融碱，不溶于[[醇]]。

==制备==
[[钨酸铵]]与[[硫化氢]]气体反应，沉淀出[[四硫代钨酸铵]]。后者再经高温焙烧，分解为二硫化钨。
:<math>\rm \ (NH_4)_2WO_4+4H_2S\rightarrow (NH_4)_2WS_4\downarrow +4H_2O</math>
:<math>\rm \ 2(NH_4)_2WS_4+3O_2\rightarrow 2WS_2+4NH_3\uparrow +2S+2SO_2\uparrow +2H_2O</math>

==用途==
二硫化钨是一种新型的固体润滑剂，适用于高温、高压、高负荷和高真空条件下的润滑。可添加在工程塑料中制成自润滑元件，也可与挥发性溶剂混合，喷涂于金属表面，在冲锻中用来提高模具寿命和工件的光洁度。

==参考资料==
{{reflist}}

{{钨化合物}}

[[Category:钨化合物]]
[[Category:硫化物]]
[[Category:过渡金属二硫属化物]]
[[Category:缺少物质图片的化学品条目]]