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Pyrrhotite

Chemical Formula

Fe7S8

Chemical Class

Sulfides

Properties

It presents well formed pseudo-hexagon crystal habit, its hardness range from 3.5 to 4.5, and its density is 4.53. It has metallic gloss and its color can be bronze yellow, golden, reddish bronze and brown.

Origin

Morro Velho Mine, Nova Lima, MG.

Curiosities

Pyrrhotite is an iron sulphide that presents magnetism, and it is, after Magnetite, the most common mineral that manifests this property.

Use

It is a mineral used as raw material to manufacture sulphuric acid, and it can also be Ni and Co source.

Source: MM Gerdau - Museu das Minas e do Metal -

ABC of mining

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