Rammelsbergite

Rammelsbergite is a nickel arsenide mineral with formula NiAs₂. It forms metallic silvery to tin white to reddish orthorhombic prismatic crystals, but is usually massive in form. It has a Mohs hardness of 5.5 and a specific gravity of 7.1.

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It was first described in 1854 from its type locality in the Schneeberg District in Saxony, Germany. It was named after the German chemist and mineralogist, Karl Friedrich August Rammelsberg.

References

• Webmineral
• Mindat with location data
• Mineral Galleries