Nickel(II) oxide

Face-centered cubic

A = 417 pm

• Nickel monoxide
• Nickel oxide ( Warning: ambiguous )
• Nickel monoxide (deprecated)
• Bunsenite ( as a mineral )

Odorless, dark green to black powder

Fixed

6.72 g · cm -3

1984 ° C

Practically insoluble in water

Risk

For carcinogenic substances no MAK value is generally assigned

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Nickel ( II) oxide is a chemical compound of the metal, nickel, which belongs to the group of the oxides.

Occurrence

Of course, the nickel (II ) oxide is present as mineral bunsenite.

Production and representation

It is obtained by calcining the strong nitrate (Ni (NO3 ) 2) or carbonate ( nico3 ) or by oxidation of Rotnickelkies ( NiAs ) or pure nickel in the air.

Properties

Nickel ( II) oxide is a basic oxide. It is antiferromagnetic and has a crystal structure similar to that of sodium chloride. Pure NiO is bright yellow. A higher oxygen content gives the NiO a green to gray -green color. Darker to black products increasingly include Ni3 . Nickel obtained at high temperatures ( II) oxide is almost insoluble in acids and alkalis; The lower the temperature representation for more soluble, it is, especially in hot nitric acid and ammonia.

Use

Nickel ( II) oxide (referred to as adhesive agent ), ceramics, glasses used for the production of enamel ( as a colorant ), and electrodes. Furthermore, it is used as an anode material in fuel cells. In addition, it is used as a catalyst for the hydrogenation of organic compounds. Furthermore, it is an intermediate for the production of pure nickel ( reduction with carbon monoxide).

Safety

Like many other nickel compounds are classified as carcinogenic nickel (II ) oxide.