Samarium (III) iodide

Crystal structure
__ Sm 3+      __ I -
General
Surname	Samarium (III) iodide
other names	Samarium triiodide
Ratio formula	SmI 3
Brief description	orange crystals
External identifiers / databases
CAS number 13813-25-7 EC number 237-468-2 ECHA InfoCard 100,034,048 PubChem 83746 Wikidata Q1310443
properties
Molar mass	531.07 g mol −1
Physical state	firmly
Melting point	850 ° C
solubility	reacts with water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Samarium (III) iodide (SmI ₃ ) is a chemical compound made up of the elements samarium and iodine .

properties

By reducing anhydrous samarium (III) iodide in a hydrogen stream at around 750 ° C, the preparation of samarium (II) iodide is possible :

${\displaystyle \mathrm {2\ SmI_{3}\ +\ H_{2}\ \longrightarrow \ 2\ SmI_{2}\ +\ 2\ HI} }$

Samarium (II) iodide is also produced by reducing samarium (III) iodide with metallic samarium:

${\displaystyle \mathrm {2\ SmI_{3}\ +\ Sm\ \longrightarrow \ 3\ SmI_{2}} }$

Individual evidence

1. ↑ ^{a b c} David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-86.
2. ↑ ^{a b} Datasheet Samarium (III) iodide, anhydrous, powder from Sigma-Aldrich , accessed on May 12, 2012 ( PDF ).
3. ↑ ^{a b} G. Jantsch, N. Skalla: “To the knowledge of the halides of the rare earths. IV. - About samarium (II) iodide and the thermal degradation of samarium (III) iodide ”, in: Journal for inorganic and general chemistry , 1930 , 193 , pp. 391–405; doi : 10.1002 / zaac.19301930132 .