Djurleite - Encyclopedia
Class : Sulfides and sulfosalts
Subclass : Sulfides
Crystal system : Monoclinic
Chemistry : Cu31S16
Rarity : Rare
Digenite is a relatively rare secondary copper sulfide. It comes from the alteration of chalcocite, chalcopyrite and bornite, and very often accompanies covellite and digenite in the oxidation and cemantation zones of copper deposits. It was named in honor of the Swedish chemist Seved Djurle who synthesized the compound before its discovery in its natural state. Djurleite is mostly massive, rarely in centimeter-sized crystals forming chunky prisms or thick black tablets.
Main photo : Djurleite from Aït Ahmane, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco © Rob Lavinsky
Djurleite in the World
Twinning
A twin is common on {110}.
Fakes and treatments
No fake listed for this mineral species.
Hardness : 2.5 to 3
Density : 5.74
Fracture : Irregular to sub-conchoidal
Streak : Black
TP : Opaque
RI : -
Birefringence : -
Optical character : -
Pleochroism : None
Fluorescence : None
Solubility : Nitric acid
Magnetism : None
Radioactivity : None