Yttrium iodide

Yttrium iodide
Names
	Other names Triiodoyttrium, yttrium triiodide, yttrium(3+) triiodide
Identifiers
CAS Number	13470-38-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	75345;
ECHA InfoCard	100.033.383
EC Number	236-737-1;
PubChem CID	83510;
UNII	IWJ2Y80D1J ;
CompTox Dashboard (EPA)	DTXSID9065499 ;
	InChI InChI=1S/3HI.Y/h3*1H;/q;;;+3/p-3 Key: LFWQXIMAKJCMJL-UHFFFAOYSA-K;
	SMILES [Y](I)(I)I;
Properties
Chemical formula	YI; 3
Molar mass	469.6193 g/mol
Appearance	Colorless crystals
Melting point	1,000 °C (1,830 °F; 1,270 K)
Boiling point	1,310 °C (2,390 °F; 1,580 K)
Solubility in water	Soluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Yttrium iodide is a binary inorganic compound, a salt of yttrium and hydroiodic acid with the formula YI
₃.^[2]^[3] The compound forms colorless crystals, soluble in water.

Synthesis

1. Heating yttrium and iodine in an inert atmosphere:

{\ce {2Y + 3I2 -> 2YI3}}

{\ce {Y2O3 + 6NH4I -> 2YI3 + 6NH3 + 3H2O}}

It can also be obtained by reacting yttrium oxide or yttrium hydroxide with hydroiodic acid.

Yttrium iodide forms colorless flaky crystals. The crystal structure is that of the BiI
₃ structure type.^[4]

It dissolves well in water and ethanol. Does not dissolve in diethyl ether.

It also occurs as a tri- and hexahydrate.^[5]

A precursor for YBCO superconducting materials in a lower temperature preparation.^[6]

^ "yttrium triiodide". webbook.nist.gov. Retrieved 2 November 2021.
^ Quarterly Metallurgical Progress Report. United States Atomic Energy Commission, Technical Information Service Extension. June 1960. p. 5. Retrieved 2 November 2021.
^ "Yttrium Iodide". American Elements. Retrieved 2 November 2021.
^ Jongen, L.; Meyer, G. (1 August 2005). "Yttrium triiodide, YI3". Acta Crystallographica Section E. 61 (8): i151 – i152. Bibcode:2005AcCrE..61I.151J. doi:10.1107/S1600536805019847. ISSN 1600-5368. Retrieved 2 November 2021.
^ Emeleus, H.J.; Sharpe, Alan G. (1981). Advances in Inorganic Chemistry and Radiochemistry. Academic Press. p. 65. ISBN 0-12-023624-9.
^ "Yttrium(III) iodide". Sigma Aldrich. Retrieved 2 November 2021.