Europium (II) sulfide

Crystal structure
__ Eu 2+      __ S 2−
General
Surname	Europium (II) sulfide
other names	Europium monosulfide Europium sulfide (ambiguous)
Ratio formula	EuS
Brief description	black solid
External identifiers / databases
CAS number 12020-65-4 EC number 234-661-3 ECHA InfoCard 100,031,498 PubChem 82809 Wikidata Q5931256
properties
Molar mass	184.03 g mol −1
Physical state	firmly
density	5.7 g cm −3
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Europium (II) sulfide is an inorganic chemical compound of europium from the group of sulfides .

Extraction and presentation

Europium (II) sulfide can be produced directly by reacting europium and sulfur .

${\displaystyle \mathrm {Eu+S\longrightarrow EuS} }$

It is also possible to display it by reacting hydrogen sulfide with europium (III) oxide at 1050 ° C or europium (II) oxalate at 800 ° C.

${\displaystyle \mathrm {Eu_{2}O_{3}+3\ H_{2}S\longrightarrow 2\ EuS+3\ H_{2}O+S} }$

${\displaystyle \mathrm {Eu(C_{2}O_{4})\cdot H_{2}O+H_{2}S\longrightarrow EuS+2\ H_{2}O+CO_{2}+CO} }$

properties

Europium (II) sulfide is a black solid that is stable in dry air, is practically insoluble in water and dissolves in acids with the development of hydrogen sulfide. Slow hydrolysis occurs in moist air . When heated in air, the compound is oxidized to the oxide sulfate. In an inert environment, decomposition takes place from 1470 ° C. Europium (II) sulfide has a cubic crystal structure of the sodium chloride type, is a semiconductor and ferromagnetic below 16.5 K.

Individual evidence

1. ↑ ^{a b c} Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 0-412-30120-2 , pp. 3125 ( limited preview in Google Book search).
2. ^ William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–63 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ↑ ^{a b c} Georg Brauer , with the assistance of Marianne Baudler a . a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1098 .
5. ↑ azom.com: Europium Sulfide (EuS) Semiconductors , accessed on May 10, 2014