Definition of "pyrite" in Anglais

noun

1. (mineralogy) The common mineral iron disulfide (FeS₂), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.

2. (usually as a plural: pyrites) Any metallic-looking sulphide, such as the above, which is the most common.

3. (solid state chemistry) (usually as a plural: pyrites) Any metal dichalcogenide that is isostructural to the common mineral.

   • Copper diselenide can occur both as a marcasite and a pyrite.