Ytterbium(III) iodide

Ytterbium(III) iodide is one of ytterbium's iodides, with the chemical formula of YbI₃.

Ytterbium(III) iodide

Names
Other names Ytterbium triiodide Ytterbium iodide
Identifiers
CAS Number	13813-44-0 Y
3D model (JSmol)	Interactive image
ChemSpider	75573
ECHA InfoCard	100.034.053
EC Number	237-474-5
PubChem CID	25212330
CompTox Dashboard (EPA)	DTXSID0065648
InChI InChI=1S/3HI.Yb/h3*1H;/q;;;+3/p-3 Key: LSSJSIMBIIVSTN-UHFFFAOYSA-K
SMILES [I-].[I-].[I-].[Yb+3]
Properties
Chemical formula	YbI3
Appearance	yellow crystals[1]
Melting point	700 °C (1,292 °F; 973 K) decomposes[1]
Solubility in water	soluble[1]
Hazards
GHS labelling:[2]
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Ytterbium(III) iodide can be prepared by reacting metallic ytterbium with iodine at 500°C with a 30 atm pressure:^[3]

2 Yb + 3 I₂ → 2 YbI₃

Ytterbium(III) oxide, ytterbium(III) hydroxide or ytterbium(III) carbonate can react with hydroiodic acid to obtain ytterbium(III) iodide in aqueous solution:

Yb₂O₃ + 6 HI → 2 YbI₃ + 3 H₂O

Yb(OH)₃ + 3 HI → YbI₃ + 3 H₂O

Yb₂(CO₃)₃ + 6 HI → 2 YbI₃ + 3 H₂O + 3 CO₂

The ytterbium(III) iodide hydrate crystallized from the solution can be heated with ammonium iodide to obtain the anhydrous form.^[4]

Reactions

Ytterbium(III) iodide decomposes to ytterbium(II) iodide upon heating:^[5]

2 YbI₃ → 2 YbI₂ + I₂