Magnesium sulfide

Crystal structure
__ Mg 2+      __ S 2−
General
Surname	Magnesium sulfide
other names	Magnesium (II) sulfide
Ratio formula	MgS
Brief description	white or reddish to reddish brown powder
External identifiers / databases
CAS number 12032-36-9 EC number 234-771-1 ECHA InfoCard 100,031,597 PubChem 82824 ChemSpider 8305407 Wikidata Q424250
properties
Molar mass	56.38 g mol −1
Physical state	firmly
density	2.68 g cm −3
Melting point	> 2000 ° C (decomposition)
solubility	Decomposes in water
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 .

Magnesium sulfide is a chemical compound from the group of sulfides . It is in the form of a reddish to reddish brown powder. Chemically pure MgS is colorless.

Occurrence

Of course, magnesium sulfide occurs as a component of the mineral niningerite, which is found in meteorites .

Extraction and presentation

Magnesium sulfide can be obtained by reacting sulfur or hydrogen sulfide with magnesium .

${\displaystyle \mathrm {Mg+H_{2}S\longrightarrow MgS+H_{2}} }$

Production from magnesium sulphate using the carbon disulphide process from Tiede and Richter is also possible,

${\displaystyle \mathrm {3\ MgSO_{4}+4\ CS_{2}\longrightarrow 3\ MgS+4\ COS+4\ SO_{2}} }$

and by passing hydrogen sulfide over ammonium carnallite .

${\displaystyle \mathrm {NH_{4}Cl\cdot MgCl_{2}\cdot 6H_{2}O+H_{2}S\longrightarrow MgS+2\ HCl+NH_{4}Cl+6\ H_{2}O} }$

properties

The crystal structure of magnesium sulfide is cubic and corresponds to that of sodium chloride .

On contact with water or moisture , magnesium sulfide hydrolyzes , producing magnesium hydroxide and magnesium hydrogen sulfide :

${\displaystyle \mathrm {2\ MgS+2\ H_{2}O\rightarrow \ Mg(OH)_{2}+Mg(SH)_{2}} }$

use

Magnesium sulfide is used in cosmetics as a depilatory . Magnesium sulfide doped with cerium and samarium luminesces when irradiated with UV light after optical stimulation and is therefore used as a dosimeter material.

Individual evidence

1. ↑ ^{a b c d} data sheet magnesium: magnesium sulphide at Webelements, accessed on February 3, 2018.
2. ↑ ESPI Metals: MSDS ( Memento from February 9, 2006 in the Internet Archive ) (PDF file; 8 kB)
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 (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 909.
5. ↑ 2006/257 / EC: Commission Decision of February 9, 2006 amending Commission Decision 96/335 / EC establishing a list and a common nomenclature of the ingredients of cosmetic products
6. ↑ Radiation protection