Nickel sulfide

• Nickel monosulfide
• Nickel sulfide ( Warning: ambiguous )
• Sulfur nickel (deprecated)

Odorless black powder

Fixed

5.25 g · cm -3

797 ° C

Practically insoluble in water (4 mg · l -1)

Risk

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Nickel ( II ) sulphide is nickel ( II) salt to the hydrogen sulphide, which is a chemical compound selected from the group of the sulfides.

Occurrence

Nickel (II ) sulfide occurs naturally as the mineral millerite. It may also arise in the manufacture of glass as undesirable inclusion in glasses, which may lead to fractures.

Production and representation

Nickel ( II ) sulfide precipitates from ammonia, but not acidic, nickel-containing solution with ammonium sulfide, and serves as a detection reaction.

α - nickel (II ) sulphide can be represented by the reaction of nickel (II) chloride hexahydrate in an ammonium chloride solution with hydrogen sulfide under exclusion of air.

β - nickel (II ) sulphide can be obtained at 900 ° C of the elements.

γ - nickel (II ) sulphide can be dargesteltt by nickel sulfate with hydrogen sulfide.

Properties

γ - nickel (II) sulfide, is a black powder. In dilute hydrochloric acid, it is poorly soluble. It has a hexagonal crystal structure millerite type with space group R 3 ¯ m (a = 961.2 pm, c = 325.9 pm ) and it is at 396 ° C in the β - nickel (II ) sulphide on. This is also a black powder, which is soluble in hot hydrochloric acid. It has a crystal structure of Nickelarsenid type with the space group C6mc (a = 343.9 pm, c = 534.8 pm ). α - nickel (II ) sulphide is an X-ray amorphous black powder, which is soluble in hydrochloric acid. It goes on the air in Ni ( OH) S.

Use

Using nickel (II ) sulphide mineral as the nickel production and as a catalyst.

Safety

How many nickel compounds are classified as carcinogenic nickel sulfide.