Metazeunerite
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Metazeunerite is an arsenate mineral with a chemical formula of Cu(UO₂)₂(AsO₄)₂·8H₂O. The origin of this mineral is almost always from the natural dehydration process of zeunerite.
It is named for civil engineer Gustav A. Zeuner, who worked at the... Wikipedia
Crystal class: Dipyramidal (4/m); (same H-M symbol)
Crystal habit: Tabular rectangular crystals with two pinacoid faces; foliated or micaceous aggregates
Crystal system: Tetragonal
Optical properties: Uniaxial (−)