Erikapohlite
Erikapohlite is an IMA-recognized mineral species in the arsenate class, with the chemical formula ( ₀.₅Cu₀.₅)CuCaZn₂(AsO₄)₃·H₂O.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Alluaudite structural group.
Key properties: specific gravity 4.55; Pale blue streak; Vitreous luster.
IMA symbol Erk, IMA status: approved, named in 2010.
A secondary mineral formed by weathering tennantite-rich veins in the oxidized zone of a dolostone-hosted, hydrothermal polymetallic deposit.
It is found associated with Lammerite, conichalcite, quartz.
The mineral was named to honor Erika Pohl (b. 1919) who donated her mineral collection of more than 40, 000 specimens to the Bergakademie Freiberg, Saxony, Germany.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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