Nickel disulfide
Crystal structure | |||||||||||||
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__ Ni 2+ __ S 2 2− | |||||||||||||
General | |||||||||||||
Surname | Nickel disulfide | ||||||||||||
other names |
Nickel (II) disulfide |
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Ratio formula | NiS 2 | ||||||||||||
Brief description |
dark iron gray solid |
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External identifiers / databases | |||||||||||||
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properties | |||||||||||||
Molar mass | 122.83 g mol −1 | ||||||||||||
Physical state |
firmly |
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density |
4.45 g cm −3 |
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Melting point |
1007 ° C |
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solubility |
almost insoluble in water |
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safety instructions | |||||||||||||
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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.
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
- ↑ a b Heinrich Remy: Textbook of Inorganic Chemistry Volume II, Leipzig 1973, page 413
- ↑ a b c d e data sheet nickel sulfide, 99% (metals basis) from AlfaAesar, accessed on May 30, 2016 ( PDF )(JavaScript required) .
- ^ 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).
- ↑ 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.