Nickel disulfide

Crystal structure
__ Ni 2+      __ S 2 2−
General
Surname	Nickel disulfide
other names	Nickel (II) disulfide
Ratio formula	NiS 2
Brief description	dark iron gray solid
External identifiers / databases
CAS number 12035-51-7 EC number 683-050-1 ECHA InfoCard 100.208.569 Wikidata Q4162396
properties
Molar mass	122.83 g mol −1
Physical state	firmly
density	4.45 g cm −3
Melting point	1007 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 317-341-350-372-410 P: 260-261-280-363-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel disulfide is an inorganic chemical compound of nickel from the group of disulfides .

Occurrence

Nickel disulfide occurs naturally in the form of the mineral vaesite .

Extraction and presentation

Nickel disulphide can be obtained by reacting nickel (II) sulphide with sulfur at 450 ° C.

${\displaystyle \mathrm {NiS+S\longrightarrow NiS_{2}} }$

properties

Nickel disulfide is an antiferromagnetic black odorless solid that is insoluble in water. It is dissolved in nitric acid with decomposition. It is sensitive to air even when dry, whereby sulfur dioxide is formed, which remains partially adsorbed on the preparation . It has a crystal structure of the pyrite type with the space group Pa 3 (space group no. 205) and the lattice parameter a = 552.4 pm. The compound can incorporate sulfur into the lattice. It is isomorphic with iron (II) and cobalt disulphide .

Individual evidence

1. ↑ ^{a b} Heinrich Remy: Textbook of Inorganic Chemistry Volume II, Leipzig 1973, page 413
2. ↑ ^{a b c d e} data sheet nickel sulfide, 99% (metals basis) from AlfaAesar, accessed on May 30, 2016 ( PDF )(JavaScript required) .
3. ^ ^{A b c} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 644 f . ( limited preview in Google Book search).
4. ↑ ^{a b} Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1694.