查看“︁二碘化镧”︁的源代码

{{Chembox
|ImageFile=LaI2.png
|Section1={{Chembox Identifiers
|CASNo=19214-98-3}}
|Section2={{Chembox Properties
| Appearance= 蓝黑色固体<ref name="Smith L. Holt">{{cite book | last=Holt Jr. | first=Smith L. | title=Inorganic syntheses. Volume 22 | publication-place=New York | date=1983 | isbn=978-0-470-13288-3 | oclc=86223480 |page=36}}</ref>
|La=1|I=2
| Density= 5.46 g·cm<sup>−3</sup><ref name="Smith L. Holt" />
| MeltingPt= 830 °C<ref name="Smith L. Holt" />
|BoilingPt=
|Solubility=
}}
|Section8={{Chembox Related
|OtherCations=[[二碘化铈]]<br />[[二碘化镨]]
|OtherCpds=[[碘化镧]]
}}
}}

'''二碘化镧'''是[[镧]]的一种[[碘化物]]，化学式 LaI<sub>2</sub>。它是[[电子盐]]，真实结构为 La<sup>3+</sup>[(I<sup>−</sup>)<sub>2</sub>e<sup>−</sup>]。<ref>{{cite book | last=Holleman | first=Arnold F. | author2=Walter de Gruyter GmbH & Co. KG | title=Anorganische Chemie Band 2. Nebengruppenelemente, Lanthanoide, Actinoide, Transactinoide | publication-place=Berlin | date=2017 | isbn=978-3-11-051854-2 | oclc=968134924 | language=de |page=1789}}</ref>

== 制备 ==
二碘化镧可以由[[碘化镧]]在800至900 °C的真空下被金属镧还原而成：<ref name="brauer">{{cite book | last=Brauer | first=Georg | title=Handbook of Preparative Inorganic Chemistry V1. | publisher=Elsevier Science | publication-place=Burlington | date=1963 | isbn=978-0-323-16127-5 | oclc=843200092 |page=1081}}</ref>
:<math>\mathrm{La + 2 \ LaI_3 \longrightarrow 3 \ LaI_2}</math>

它也可以由[[碘化汞]]和镧反应而成：<ref name="brauer" />
:<math>\mathrm{La + HgI_2 \longrightarrow LaI_2 + Hg}</math>

二碘化镧是由John D. Corbett于1961年首次合成的。<ref name="DOI10.1007/BF01317584">{{cite journal | last=Jungmann | first=Angelika | last2=Claessen | first2=R. | last3=Zimmermann | first3=R. | last4=Meng | first4=Ge | last5=Steiner | first5=P. | last6=Hüfner | first6=S. | last7=Tratzky | first7=S. | last8=Stöwe | first8=K. | last9=Beck | first9=H. P. | title=Photoemission of LaI2 and CeI2 | journal=Zeitschrift für Physik B Condensed Matter | publisher=Springer Science and Business Media LLC | volume=97 | issue=1 | year=1995 | issn=0722-3277 | doi=10.1007/bf01317584 | pages=25–34}}</ref>

== 性质==
二碘化镧是有金属光泽的蓝黑色固体，极易[[水解]]成碘氧化物。<ref name="brauer" />它是[[二硅化钼|MoSi<sub>2</sub>]]结构的晶体，空间群I4/mmm (No. 139)。<ref name="Christoph Janiak, Hans-Jürgen Meyer, Dietrich Gudat, Ralf Alsfasser">{{cite book | last=Riedel | first=Erwin | last2=Janiak | first2=Christoph | last3=Meyer | first3=Hans-Jürgen | title=Riedel, moderne anorganische Chemie | publisher=De Gruyter | publication-place=Berlin | date=2012 | isbn=978-3-11-024900-2 | oclc=781540844 | language=de |page=240}}</ref>

== 参考资料==
<references />
{{镧化合物}}
{{碘化物}}

[[Category:镧化合物]]
[[Category:碘化物]]
[[Category:电子盐]]
[[Category:1960年代发现的物质]]