Vanackerite
Vanackerite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Pb₄Cd(AsO₄)₃Cl.
It crystallizes in the hexagonal crystal system (space group P3). It is a member of the Apatite structural group.
Key properties: Mohs hardness 4; specific gravity 7.28; White streak; Adamantine luster.
IMA symbol Vnk, IMA status: approved, named in 2011.
Found as a secondary mineral in the oxidized zone of a dolostone-hosted, polymetallic, hydrothermal ore deposit.
It is found associated with Thometzekite, anglesite, gypsum.
The mineral was named to honor Georges Vanacker (1923-1992) of Bruges, Belgium, whose systematic mineral collection includes many specimens from the Tsumeb deposit, in one of which.
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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