Jamesonite


Use Wikipedia with dynamical search help in all languages ...

Wikipedia - How to create a page
Jamesonite
Jamesonite-rom27a.jpg
Jamesonite crystals
General
CategorySulfosalt
Formula
(repeating unit)
Pb4FeSb6S14
Strunz classification2.HB.15
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/a
Identification
Colorgray-black
Cleavage{001} good; also possibly {010} and {120}
Mohs scale hardness2+12
Lustermetallic
Streakgray-black
Diaphaneityopaque
Specific gravity5.63

Jamesonite is a sulfosalt mineral, a lead, iron, antimony sulfide with formula Pb4FeSb6S14. With the addition of manganese it forms a series with benavidesite.[1] It is a dark grey metallic mineral which forms acicular prismatic monoclinic crystals. It is soft with a Mohs hardness of 2.5 and has a specific gravity of 5.5 - 5.6.[2] It is one of the few sulfide minerals to form fibrous or needle like crystals. It can also form large prismatic crystals similar to stibnite with which it can be associated. It is usually found in low to moderate temperature hydrothermal deposits.[1]

It was named for Scottish mineralogist Robert Jameson (1774–1854). It was first identified in 1825 in Cornwall, England.[3] It is also reported from South Dakota and Arkansas, US; Zacatecas, Mexico; and Romania.

References[edit]

External links[edit]


DuckDuckGo

wikipedia mobileThis page is funded by cryptomining