User:Chris857/Boulangerite

Boulangerite is a sulfosalt mineral with formula Pb5Sb4S11. The mineral was named in 1837 for Charles Louis Boulanger (1810–1849).

Occurrence
Boulangerite occurs in association with arsenopyrite, galena, pyrite, quartz, siderite, sphalerite, stibnite, and various lead sulfosalts.

Boulangerite has a very wide distribution; it is known from localities in North and South America, Europe, Africa, Asia, and Australia.

History
In 1837, M. C. J. Thaulow named the mineral Boulangerit, in honor of French mining engineer Charles Louis Boulanger. Boulanger analyzed a sample of the mineral from France and Thaulow analyzed material from Scandinavia (Lapland).

When the IMA was founded, boulangerite was grandfathered as a valid mineral species.