Misplaced Pages

Dysprosium(III) iodide

Names
Other names Dysprosium triiodide, triiododysprosium
Identifiers
CAS Number	15474-63-2
3D model (JSmol)	Interactive image
ChemSpider	76618
ECHA InfoCard	100.035.888
EC Number	239-493-4
PubChem CID	519122
CompTox Dashboard (EPA)	50935055
InChI InChI=1S/Dy.3HI/h;3*1H/q+3;;;/p-3Key: RZQFCZYXPRKMTP-UHFFFAOYSA-K
SMILES I(I)I
Properties
Chemical formula	DyI3
Molar mass	543.213 g·mol
Appearance	yellow-green flaky solid
Density	g/cm
Melting point	955 °C (1,751 °F; 1,228 K)
Boiling point	1,320 °C (2,410 °F; 1,590 K)
Solubility in water	soluble
Structure
Crystal structure	trigonal
Related compounds
Related compounds	Ytterbium(III) iodide
Hazards
GHS labelling:
Pictograms
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Dysprosium(III) iodide is a binary inorganic compound of dysprosium and iodine with the chemical formula DyI
₃.

Synthesis

Dysprosium(III) iodide can be obtained by reacting dysprosium with iodine.

2Dy + 3I → 2DyI₃

Dysprosium(III) iodide can be obtained using the effect of mercury diiodide on dysprosium filings:

2Dy + 3HgI₂ → 2DyI₃ + 3Hg

Physical properties

Dysprosium(III) iodide is a hygroscopic yellow-green flaky solid that is soluble in water. The compound has a trigonal crystal structure of the bismuth(III) iodide type with the space group R3.

Uses

Dysprosium(III) iodide is used in gas discharge lamps to generate white light.

References

1. "dysprosium triiodide". NIST. Retrieved 5 April 2023.
2. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3117. ISBN 978-0-412-30120-9. Retrieved 5 April 2023.
3. "Dysprosium(III) iodide, ultra dry, 99.99% (REO), Thermo Scientific Chemicals". fishersci.com. Retrieved 5 April 2023.
4. Emsley, John (2003). Nature's Building Blocks: An A-Z Guide to the Elements. Oxford University Press. p. 131. ISBN 978-0-19-850340-8. Retrieved 5 April 2023.

• Iodides
• Lanthanide halides
• Dysprosium compounds