Silvery metallic crystal aggregates of the very rare Cu-Hg mineral belendorffite from the TL in Moschellandsberg (Landsberg, Obermoschel, Donnersbergkreis, Rhineland-Palatinate, Germany). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Belendorffite
Belendorffite is an IMA-recognized mineral species in the native element class, with the chemical formula Cu₇Hg₆.
It crystallizes in the hexagonal crystal system (space group R3m).
Key properties: specific gravity 13.2; Silvery streak; Metallic luster.
IMA symbol Bdf, IMA status: approved, named in 1989.
Found in a mercury deposit.
It is found associated with Mercury.
In honor of Klaus Belendorff (1956–), mineral collector of Münster, Germany, who first noted the mineral.