Cobaltinitrite

Cobaltinitrite is a chemical compound with the formula Co(NO2)2. It is a dark blue or black crystalline solid that is highly soluble in water. The compound is formed by the reaction of cobalt(II) ions with nitrous acid (HNO2) or its salts. Cobaltinitrite is a rare compound in nature, but it can be synthesized in the laboratory.

The compound is notable for its magnetic properties. It exhibits antiferromagnetic ordering below a critical temperature of about 2.5 K. This behavior is due to the presence of cobalt(II) ions, which have a spin of 1/2 and can align in an antiferromagnetic manner.

Cobaltinitrite is also of interest in the field of materials science. It can be used as a precursor for the synthesis of other cobalt-containing materials, such as cobalt oxides and cobalt nitrides. Additionally, it has been studied for its potential applications in catalysis and as a component in magnetic materials.

In summary, cobaltinitrite is a dark blue or black crystalline solid with the formula Co(NO2)2. It is highly soluble in water and exhibits antiferromagnetic ordering below a critical temperature. The compound is rare in nature but can be synthesized in the laboratory, and it has potential applications in materials science and catalysis.