Freibergite is a complex sulfosalt mineral of silver, copper, iron, antimony and arsenic with formula (Ag,Cu,Fe)12(Sb,As)4S13. It has cubic crystals and is formed in hydrothermal deposits. It forms one solid solution series with tetrahedrite and another with argentotennantite. Freibergite is an opaque, metallic steel grey to black and leaves a reddish-black streak. It has a Mohs hardness of 3.5 to 4.0 and a specific gravity of 4.85 to 5. It is typically massive to granular in habit with no cleavage and an irregular fracture.
The mineral was first described in 1853 from an occurrence in the silver mines of the type locality at Freiberg, Saxony.
Freibergite is a complex sulfosalt mineral of silver, copper, iron, antimony and arsenic with formula (Ag,Cu,Fe)12(Sb,As)4S13. It has cubic crystals and...
a recognized variety. The related, silver dominant, mineral species freibergite, although rare, is notable in that it can contain up to 18% silver. Tetrahedrite...
pyrrhotite and marcasite, with minor sulfosalts such as tetrahedrite-freibergite and boulangerite; the zinc + lead grade typically ranges between 10 and...
(pyrite), arsenical iron (arsenopyrite), argentiferous grey copper ore (freibergite), dark-red silver ores (Pyrargyrite), and silver glance. The most important...
ore minerals are galena and sphalerite. The silver occurs mainly as freibergite but is also present in solid solution within the galena. The deposit...
the gangue. The ore mineral is tetrahedrite with 11% silver, making it freibergite. In 1930, an extremely rich ore body was discovered within the Sunshine...
generally be located in proximity with minerals argentite, siderite, freibergite, polybasite, and aramayoite. List of minerals List of minerals named...
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