Conichalcite will also form a solid solution series with the mineral calciovolborthite.
2.
Duftite and conichalcite specimens from Tsumeb are commonly zoned in color and composition.
3.
It is a member of the adelite-descloizite Group, Conichalcite-Duftite Series.
4.
Conichalcite is the arsenic rich end member of the series and calciovolborthite is the vanadium rich end member.
5.
"' Duftite "'is a relatively common arsenate mineral with the formula CuPb ( AsO 4 ) ( OH ), related to conichalcite.
6.
Associated minerals include olivenite, cornubite, arthurite, clinoclase, chalcophyllite, strashimirite, lavendulan, tyrolite, spangolite, austinite, conichalcite, brochantite, azurite and malachite.
7.
"' Austinite "'is a member of the adelite-descloizite group, adelite subgroup, the Zn end member of the Cu-Zn series with conichalcite.
8.
Notable occurrences of conichalcite include US; Durango, Mexico; Collahuasi, Tarapaca, Chile; Calstock, Cornwall and Caldbeck Fells, Cumbria, England; Andalusia, Spain; and Tsumeb, Namibia.
9.
This indicates a solid solution among conichalcite, CaCu ( AsO 4 ) ( OH ), austinite, CaZn ( AsO 4 ) ( OH ) and duftite PbCu ( AsO 4 ) ( OH ), all of them belonging to the adelite group of arsenates.
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