Dysprosium(III) iodide

Dysprosium(III) iodide

File:Kristallstruktur Bismut(III)-iodid.png
Names
Other names Dysprosium triiodide, triiododysprosium
Identifiers
CAS Number	15474-63-2
3D model (JSmol)	Interactive image
ChemSpider	76618
ECHA InfoCard
EC Number	239-493-4
E number
PubChem CID	519122
CompTox Dashboard (EPA)	50935055
InChI InChI=1S/Dy.3HI/h;3*1H/q+3;;;/p-3 Key: RZQFCZYXPRKMTP-UHFFFAOYSA-K
SMILES I[Dy](I)I
Properties
Chemical formula	DyI3
Molar mass	543.213 g·mol−1
Appearance	yellow-green flaky solid
Density	g/cm3
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	GHS08: Health hazard
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 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.