查看“︁碲化鉀”︁的源代码

{{chembox
| verifiedrevid = 
|   Name = 碲化鉀
|   CustomizedImage = [[File:CaF2 polyhedra.png|250px|碲化鉀]]<br/><center>K<sup>+</sup>: <span style="color:#99CC00; background-color:#99CC00;">__</span> 　 Te<sup>2-</sup>: <span style="color:#C0C0C0; background-color:#C0C0C0;">__</span></center> 
|   OtherNames =
| Section1 = {{Chembox Identifiers
|   CASNo = 12142-40-4
|   CASNo_Ref = {{cascite|correct|CAS}}
| SMILES = [K+].[Te-2].[K+]
  }}
| Section2 = {{Chembox Properties
|   Formula = K<sub>2</sub>Te
|   Appearance = 淡黄色粉末，在空气中迅速变灰<ref>{{cite journal|journal=Inorganica Chimica Acta|volume=176|issue=2|language=en|date=1990-10|pages=271–275|doi=10.1016/S0020-1693(00)84855-0|url=https://linkinghub.elsevier.com/retrieve/pii/S0020169300848550|title=Synthesis and characterization of potassium polytellurides in liquid ammonia solution|accessdate=2019-11-23|author=Linda D. Schultz|archive-date=2020-06-04|archive-url=https://web.archive.org/web/20200604043807/https://linkinghub.elsevier.com/retrieve/pii/S0020169300848550|dead-url=no}}</ref>
|   MolarMass = 298.64 g/mol
|   Density = 
|   Solubility = 
|   MeltingPt = 874 °C
|   BoilingPt = }}
| Section8 = {{Chembox Related
|   OtherCations = [[碲化鋰]]、[[碲化鈉]]、[[碲化銣]]、[[碲化銫]]
|   OtherAnions = [[氧化鉀]]、[[硫化鉀]]、[[硒化鉀]]、[[釙化鉀]]
 }}
}}
'''碲化鉀'''是一種[[無機化合物]]，由[[碲]]和[[鉀]]組成，屬於[[碲化物]]，其化學式為K<sub>2</sub>Te<ref name="DOI10.1002/anie.197806841">Brigitte Eisenmann, Herbert Schäfer: ''K2Te3 : The First Binary Alkali-Metal Polytelluride with Te<sup>2−</sup><sub>3</sub>-Ions.'' In: ''Angewandte Chemie International Edition in English.'' 17, 1978, S.&nbsp;684, {{DOI|10.1002/anie.197806841}}.</ref>。外觀為白色粉末，碲化鉀可由鉀和碲發生反應制得，通常進行反應是利用[[液氨]]作為溶劑。碲化鉀和[[碲化銣]]、[[碲化銫]]一樣可用作太空中紫外線探測器，至於它的晶體結構，則類似於[[同族]]的[[碲化物]]，為反[[螢石]]結構。

== 制備 ==
[[碲]]和[[熔融]]的[[氰化鉀]]（KCN）反應會生成碲化鉀。亦可以透過隔絕空氣的氨環境下使鉀和碲發生反應製備<ref name="Wolfgang A. Herrmann, Christian Erich Zybill">{{Cite book| author=Wolfgang A. Herrmann, Christian Erich Zybill | title=Synthetic Methods of Organometallic and Inorganic Chemistry, Volume 4, 1997 Volume 4: Sulfur, Selenium and Tellurium | publisher=Georg Thieme Verlag | ISBN=3-13-179191-8 | year=2014 | Online={{Google Buch | BuchID=VIuZAwAAQBAJ | page=191 }} | page=191 }}</ref>：
:<math>\mathrm{2 \ K + Te \longrightarrow K_2Te}</math>

== 性質 ==
碲化钾极易被氧化：
:<math>\mathrm{2 \ K_2Te + 2 \ H_2O + O_2 \longrightarrow 4 \ KOH + 2 \ Te}</math><ref name="Wolfgang A. Herrmann, Christian Erich Zybill" /><ref name="Adolf Pinner">{{Literatur| Autor=Adolf Pinner | Titel=Repetitorium Der Anorganischen Chemie  | Verlag=Рипол Классик | ISBN=978-5-87746-719-4 | Jahr=1885 | Online={{Google Buch | BuchID=P8QOAwAAQBAJ | Seite=116 }} | Seiten=116 }}</ref>
它和[[碲化锂]]或[[碲化钠]]在氩气中加热，可以得到KLiTe或KNaTe。<ref>{{cite journal|journal=Zeitschrift für Naturforschung B|volume=44|issue=12|issn=1865-7117|date=1989-12-01|pages=1602–1604|doi=10.1515/znb-1989-1224|url=https://www.degruyter.com/view/journals/znb/44/12/article-p1602.xml|title=Notizen: Erste Interalkalimetalltelluride: NaLiTe, KLiTe, KNaTe / First Inter Alkali Metal Tellurides: NaLiTe, KLiTe, KNaTe|accessdate=2020-07-04|author=Rolf-D. Hitzbleck, Petra Vogt, Horst Sabrowsky}}</ref>

== 參考文獻 ==
{{reflist}}


{{鉀化合物}}
{{碲化合物}}

[[Category:钾化合物]]
[[Category:碲化物]]
[[Category:缺少物质图片的化学品条目]]