Bradaczekite
Bradaczekite is an IMA-recognized mineral species in the arsenate class, with the chemical formula NaCuCuCu₂(AsO₄)₃.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Alluaudite structural group.
Key properties: specific gravity 4.77; Light blue to white streak; Adamantine luster; optically biaxial.
IMA symbol Bdc, IMA status: approved, named in 2000.
Formed in a volcanic fumarole.
It is found associated with Hematite, tenorite, lammerite, urusovite, orthoclase, johillerite.
The mineral was named to honor crystallographer Hans Bradaczek (b. 1940), Free University of Berlin, 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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