Terbium(III) iodide
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 312039368
| Name = Terbium(III) iodide
| ImageFile =
| ImageName = Terbium(III) iodide
| OtherNames = terbium triiodide
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 13813-40-6
| ChemSpiderID = 75569
| EC_number = 237-469-8
| PubChem = 83747
| InChI = 1S/3HI.Tb/h3*1H;/q;;;+3/p-3
| StdInChIKey = OJXRJPFRTRETRN-UHFFFAOYSA-K
| SMILES = I[Tb](I)I
}}
|Section2={{Chembox Properties
| Formula = TbI3
| MolarMass = 539.638 g/mol
| Appearance = hygroscopic crystals
| Density = 5.2 g/cm3, solid
| MeltingPtC = 957
| BoilingPt =
| Solubility =
}}
|Section3={{Chembox Structure
| CrystalStruct = hexagonal
}}
|Section7={{Chembox Hazards
| GHSPictograms = {{GHS07}}{{GHS08}}
| GHSSignalWord = Warning
| HPhrases = {{H-phrases|317|361}}
| PPhrases = {{P-phrases|201|202|261|264|271|272|280|281|302+352|304+340|305+351+338|308+313|312|332+313|333+313|337+313|362|363|403+233|405|501}}
}}
}}
Terbium(III) iodide (TbI3) is an inorganic chemical compound.
Preparation
Terbium(III) iodide can be produced by reacting terbium and iodine.WebElements: [https://www.webelements.com/terbium/chemistry.html Chemical reactions of the element Terbium]
:{{chem2|2 Tb + 3 I2 -> 2 TbI3}}
Terbium iodide hydrate can be crystallized from solution by reacting hydriodic acid with terbium, terbium(III) oxide, terbium hydroxide or terbium carbonate:
:{{chem2|2 Tb + 6 HI → 2 TbI3 + 3 H2↑}}
:{{chem2|Tb2O3 + 6 HI → 2 TbI3 + 3 H2O}}
:{{chem2|2 Tb(OH)3 + 6 HI → 2 TbI3 + 3 H2O}}
:{{chem2|Tb2(CO3)3 + 6 HI → 2 TbI3 + 3 H2O + 3 CO2}}
An alternative method is reacting terbium and mercury(II) iodide at 500 °C.
Structure
Terbium(III) iodide adopts the bismuth(III) iodide (BiI3) crystal structure type,{{ cite book | first1 = A. F. | last1 = Wells | title = Structural Inorganic Chemistry | edition = 5th | year = 1984 | publisher = Oxford University Press | isbn = 978-0-19-965763-6 | page = 421 }}{{ cite journal | first1 = L. B. | last1 = Asprey | first2 = T. K. | last2 = Keenan | first3 = F. H. | last3 = Kruse | title = Preparation and Crystal Data for Lanthanide and Actinide Triiodides | journal = Inorg. Chem. | year = 1964 | volume = 3 | issue = 8 | pages = 1137–1141 | doi = 10.1021/ic50018a015 | url = https://digital.library.unt.edu/ark:/67531/metadc867868/ }} with octahedral coordination of each Tb3+ ion by 6 iodide ions.{{Greenwood&Earnshaw2nd|pages=1240–1241}}
References
{{reflist}}
{{Terbium compounds}}
{{iodides}}
{{Lanthanide halides}}
{{inorganic-compound-stub}}