Cardite
Cardite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Zn₅.₅(AsO₄)₂(AsO₃OH)(OH)₃·3H₂O.
It crystallizes in the orthorhombic crystal system (space group Cmcm).
Key properties: specific gravity 4.02; White streak; Vitreous luster.
IMA symbol Cdi, IMA status: approved, named in 2016.
A secondary mineral from a sulfide zone with leached sulfide minerals in a weathered Pb-Zn ore deposit.
It is found associated with Anglesite, pyromorphite, köttigite.
The mineral was named to honor George William Card (1865-1943), petrologist and mineralogist with the Geological Survey of New South Wales and a Curator of the Mining Museum in Sydney (1893-1927).
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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