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Terbium(III) iodide

From Wikipedia, the free encyclopedia
Terbium(III) iodide
Names
Other names
terbium triiodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard100.034.049Edit this at Wikidata
EC Number
  • 237-469-8
  • Key: OJXRJPFRTRETRN-UHFFFAOYSA-K
  • InChI=1S/3HI.Tb/h3*1H;/q;;;+3/p-3
  • I[Tb](I)I
Properties
TbI3
Molar mass539.638 g/mol
Appearancehygroscopic crystals
Density5.2 g/cm3, solid
Melting point957 °C (1,755 °F; 1,230 K)
Structure
hexagonal
Hazards
GHS labelling:[1]
GHS07: Exclamation markGHS08: Health hazard
Warning
H317,H361
P201,P202,P261,P264,P271,P272,P280,P281,P302+P352,P304+P340,P305+P351+P338,P308+P313,P312,P332+P313,P333+P313,P337+P313,P362,P363,P403+P233,P405,P501
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound

Terbium(III) iodide (TbI3) is aninorganicchemical compound.

Preparation

[edit]

Terbium(III) iodide can be produced by reacting terbium andiodine.[2]

2 Tb + 3 I2 → 2 TbI3

Terbium iodide hydrate can be crystallized from solution by reactinghydriodic acid with terbium,terbium(III) oxide,terbium hydroxide orterbium carbonate:

2 Tb + 6 HI → 2 TbI3 + 3 H2↑
Tb2O3 + 6 HI → 2 TbI3 + 3 H2O
2 Tb(OH)3 + 6 HI → 2 TbI3 + 3 H2O
Tb2(CO3)3 + 6 HI → 2 TbI3 + 3 H2O + 3 CO2

An alternative method is reacting terbium andmercury(II) iodide at 500 °C.[3]

Structure

[edit]

Terbium(III) iodide adopts thebismuth(III) iodide (BiI3) crystal structure type,[4][3] withoctahedral coordination of each Tb3+ ion by 6iodide ions.[5]

References

[edit]
  1. ^"Terbium iodide (TbI3)".pubchem.ncbi.nlm.nih.gov.
  2. ^WebElements:Chemical reactions of the element Terbium
  3. ^abAsprey, L. B.; Keenan, T. K.; Kruse, F. H. (1964)."Preparation and Crystal Data for Lanthanide and Actinide Triiodides".Inorg. Chem.3 (8):1137–1141.doi:10.1021/ic50018a015.
  4. ^Wells, A. F. (1984).Structural Inorganic Chemistry (5th ed.). Oxford University Press. p. 421.ISBN 978-0-19-965763-6.
  5. ^Greenwood, Norman N.; Earnshaw, Alan (1997).Chemistry of the Elements (2nd ed.).Butterworth-Heinemann. pp. 1240–1241.doi:10.1016/C2009-0-30414-6.ISBN 978-0-08-037941-8.
Terbium(III)
Terbium(III,IV)
Terbium(IV)
Salts and covalent derivatives of theiodide ion
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