查看“︁碘化镧”︁的源代码

{{chembox
| verifiedrevid = 
|   Name = 碘化镧
|   ImageFile = Unit cell of PuBr3.png
|   ImageName = 
|   OtherNames = 碘化镧(III)<br />三碘化镧
| Section1 = {{Chembox Identifiers
| CASNo = 13813-22-4
| CASNo_Ref = {{cascite|correct|CAS}}
|    ChemSpiderID_Ref  = {{chemspidercite|correct|chemspider}}|  ChemSpiderID  =  
|  PubChem  =  83743
|  InChI  = 
|  InChIKey  = 
|  SMILES  =  [La+3].[I-].[I-].[I-]
|  StdInChI_Ref  = {{stdinchicite|correct|chemspider}}|  StdInChI  = 
|  StdInChIKey_Ref  = {{stdinchicite|correct|chemspider}}|  StdInChIKey  =  
}}
| Section2 = {{Chembox Properties
|   Formula = LaI<sub>3</sub>
|   MolarMass = 519.62
|   Appearance =  白色易潮解晶体<ref name="CRC"/>
|   Density = 5.6 g/cm<sup>3</sup><ref name="CRC"/>
|   MeltingPt = 778℃<ref name="CRC">David R. Lide (Ed.): ''CRC Handbook of Chemistry and Physics.'' 90<sup>th</sup> Edition (Internet Version: 2010), CRC Press/Taylor and Francis, Boca Raton, FL, ''Properties of the Elements and Inorganic Compounds,'' S. 4-69.</ref>
|   BoilingPt = 
|   Solubility= 可溶<ref name="CRC"/>
|   SolubleOther = 
  }}
| Section7 = {{Chembox Hazards
|  EUHazardSymbol =
|  RPhrases =
|  SPhrases =
|  FlashPt = 
|  pKa = 
|  pKb = 
|  EUClass =
|  EUIndex = 
|  MainHazards = 
|  NFPA-H = 
|  NFPA-F = 
|  NFPA-R = 
|  NFPA-O = 
|  RSPhrases = 
|  Autoignition = 
|  ExploLimits = 
|  PEL = 
  }}
| Section8 = {{Chembox Related
|   Function = 
|   OtherFunctn = 
|   OtherAnions =
|   OtherCations = [[氟化镧]]<br />[[氯化镧]]<br />[[溴化镧]]
|   OtherCpds = [[氧化镧]]
  }}
}}
'''碘化镧'''是一种[[无机化合物]]，[[化学式]]为LaI<sub>3</sub>。

==制备==
* 碘化镧可以由单质直接化合得到：
:: <math>\mathsf{2La + 3I_2 \ \xrightarrow{\Delta}\ 2LaI_3 }</math>

* 也可由氧化镧和碘化铵加热反应得到：<ref>{{cite journal | last=Young | first=Ralph C. | last2=Hastings | first2=Jane L. | title=Reaction of Lanthanum Oxide with Ammonium Iodide | journal=Journal of the American Chemical Society | publisher=American Chemical Society (ACS) | volume=59 | issue=4 | year=1937 | issn=0002-7863 | doi=10.1021/ja01283a510 | pages=765–766}}</ref>
:: <math>\mathsf{La_2O_3 + 6NH_4I \ \xrightarrow{350^oC}\ 2LaI_3 + 6NH_3 + 3H_2O }</math>

==反应==
碘化镧、[[磷酸镧]]和[[二氧化硅]]在800℃下反应，生成[[三碘化磷]]：<ref>{{cite journal | last=Haschke | first=John M. | title=Reactions of strontium, lanthanum, and europium iodides. Direct preparation of phosphorus triiodide from phosphates | journal=Inorganic Chemistry | publisher=American Chemical Society (ACS) | volume=15 | issue=3 | date=1976-03-01 | issn=0020-1669 | doi=10.1021/ic50157a003 | pages=508–511}}</ref>
:5 LaI<sub>3</sub> + 3 LaPO<sub>4</sub> + 8 SiO<sub>2</sub> → 3 PI<sub>3</sub> + 3 I<sub>2</sub> + 4 La<sub>2</sub>Si<sub>2</sub>O<sub>7</sub>

用[[THF]][[萃取]]LaI<sub>3</sub>可以得到无色的LaI<sub>3</sub>(THF)<sub>4</sub>。<ref>{{cite journal | last=Izod | first=Keith | last2=Liddle | first2=Stephen T. | last3=Clegg | first3=William | title=A Convenient Route to Lanthanide Triiodide THF Solvates. Crystal Structures of LnI3(THF)4 [Ln = Pr] and LnI3(THF)3.5 [Ln = Nd, Gd, Y] | journal=Inorganic Chemistry | publisher=American Chemical Society (ACS) | volume=43 | issue=1 | date=2003-12-09 | issn=0020-1669 | doi=10.1021/ic034851u | pages=214–218}}</ref>

==参考资料==
{{reflist}}

{{碘化物}}
[[category:碘化物]]
[[category:镧化合物]]
[[Category:镧系金属卤化物]]