查看“︁二碘化铈”︁的源代码

{{NoteTA|G1=Chemistry}}
{{Chembox
|ImageFile=LaI2.png
|Section3={{Chembox Structure
| SpaceGroup= I4/mmm (No. 139)}}
|Section1={{Chembox Identifiers
| CASNo= 19139-47-0}}
|Section2={{Chembox Properties
| Appearance= 青铜色固体<ref name="William M. Haynes" />
|Ce=1|I=2
|Density=
| MeltingPt= 808 °C<ref name="William M. Haynes">{{cite book | last=Haynes | first=William | title=CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data | publisher=CRC Taylor & Francis distributor | publication-place=Boca Raton, Fla. London | year=2012 | isbn=1-4398-8049-2 | oclc=793213751 |page=4-56}}</ref>
|BoilingPt=
|Solubility=
}}
|Section8={{Chembox Related
|OtherCations=[[二碘化镧]]<br />[[二碘化镨]]<br />[[二碘化钕]]
|OtherCpds=[[三碘化铈]]
}}
}}

'''二碘化铈'''是[[铈]]的一种[[碘化物]]，化学式 CeI<sub>2</sub>。

== 制备==
二碘化铈可以由金属铈在800&nbsp;°C至900&nbsp;°C的[[真空]]下还原[[三碘化铈]]而成。<ref name="brauer">{{cite book | title=Handbuch der präparativen anorganischen Chemie | publisher=Enke | publication-place=Stuttgart | year=1975 | isbn=3-432-02328-6 | oclc=310719485 | language=de | ref={{sfnref | Enke | 1975}} |page=1081}}</ref>
:<math>\mathrm{ Ce + 2 \ CeI_3 \longrightarrow 3 \ CeI_2}</math>

它也可以由铈和[[碘化铵]]在−78&nbsp;°C的[[液氨]]下反应而成。反应形成的是二碘化铈的[[氨]]配合物，它在200&nbsp;°C的真空下会分解成二碘化铈。<ref name="brauer" />
:<math>\mathrm{Ce + 2 \ NH_4 I \longrightarrow CeI_2 + 2 \ NH_3 + H_2}</math>

二碘化铈是由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==
二碘化铈是不透明的深色固体，具有类似金属的外观和性质。二碘化铈中没有铈(II)，其真实结构是Ce<sup>3+</sup>(I<sup>−</sup>)<sub>2</sub>e<sup>−</sup> 。它极易[[水解]]，形成碘氧化物。<ref name="brauer" />和[[二碘化镧]]与[[二碘化镨]]一样，二碘化铈的晶体结构是[[二硅化钼|MoSi<sub>2</sub>]]结构，<ref name="Jane E. Macintyre">{{cite book | last=Macintyre | first=J. E. | title=Dictionary of inorganic compounds | url=https://archive.org/details/dictionaryofinor0004unse | publisher=Chapman & Hall | publication-place=London New York | year=1992 | isbn=0-412-30120-2 | oclc=26338506 |page=2820}}</ref>空间群 I4/mmm (No. 139)。<ref name="F. Hulliger">{{cite book | last=Hulliger | first=Fritz | title=Structural chemistry of layer-type phases | url=https://archive.org/details/structuralchemis0005hull | publisher=D. Reidel Pub. Co | publication-place=Dordrecht, Holland Boston | year=1976 | isbn=90-277-0714-6 | oclc=2372807 |page=[https://archive.org/details/structuralchemis0005hull/page/247 247]}}</ref>

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

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