Mass of bohdanowiczite in a quartz rich matrix, analyzed by Frank N. Keutsch at the Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA. From: Frische Lutter vein, Bad Lauterberg, Harz, Lower Saxony, Germany. — Photo: Leon Hupperichs · CC BY-SA 3.0
Bohdanowiczite
Bohdanowiczite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula AgBiSe₂.
It crystallizes in the hexagonal crystal system (space group P-3m1).
Key properties: Mohs hardness 3.2; specific gravity 7.72.
IMA symbol Boh, IMA status: approved, named in 1967.
Found in a strongly cracked zone formed in crystalline limestone adjacent to magnetite- bearing skarns (Kletno, Poland); in reduction halos in red beds (near Zurich, Switzerland).
It is found associated with Clausthalite, tiemannite, umangite, klockmannite, wittichenite, silver, naumannite, bornite, chalcopyrite, chalcocite, uraninite, fluorite, quartz (Kletno.
The mineral was named to honor Professor Karol Bohdanowicz (1864-1947), economic geologist of Cracow, Poland.