Boulangerite

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Boulangerite
Boulangerite-uri-41a.jpg
Boulangerite, covering a block of limestone
General
Category Sulfosalt minerals
Formula
(repeating unit)
Pb5Sb4S11
Strunz classification 2.HC.15
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pnam
Identification
Luster Metallic
Streak Black
References [1][2]

Boulangerite is a sulfosalt mineral, lead antimony sulfide, formula Pb5Sb4S11. It was named in 1837 in honor of French mining engineer Charles Boulanger (1810–1849). It forms metallic grey orthorhombic crystals.[2][3][4] Sometimes the crystals form a fine feathery mass which has been called plumosite. Boulangerite is used as a lead ore.[1]

References[edit]

  1. ^ a b Harlow, George, Joseph Peters, and Martin Prinz. "Sulfides." Simon & Schuster's Guide to Rocks and Minerals. New York: Simon & Schuster, 1977. Entry 44. Print.
  2. ^ a b Mineralienatlas
  3. ^ http://webmineral.com/data/Boulangerite.shtml Webmineral data
  4. ^ http://www.mindat.org/min-738.html Mindat