Aerugite

Aerugite is a rare complex nickel arsenate mineral with a variably reported formula: Ni₉(AsO₄)₂AsO₆. It forms green to deep blue-green trigonal crystals. It has a Mohs hardness of 4 and a specific gravity of 5.85 to 5.95.

Additional recommended knowledge

Daily Visual Balance Check

How to quickly check pipettes?

Essential Laboratory Skills Guide

It was first described in 1858 in either the South Terres mine of Cornwall, England or in Erzgebirge, Saxony, Germany. The origin is disputed. The most common occurrence is as an incrustation on furnace walls in which ores are roasted. Its name comes from the Greek word aerugo for copper rust.

References

• Mindat.org
• Webmineral data