Category Arsenate mineral Dana classification 42.09.02.03 | Strunz classification 8.DH.50 08 Crystal system Monoclinic | |
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Formula
(repeating unit) KCdCu5(AsO4)4(H2AsO4)ยท2H2O Crystal class Prismatic (2/m)
(same H-M symbol) | ||
Andyrobertsite is a rare, complex arsenate mineral with a blue color. It is found in the Tsumeb mine in Namibia and named after Andrew C. Roberts (b. 1950), mineralogist with the Geological Survey of Canada. A Ca-rich analogue (with Ca instead of Cd) is called calcioandyrobertsite and has a more greenish tint.
References
Andyrobertsite Wikipedia(Text) CC BY-SA