Boulangerite

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]

Boulangerite
Boulangerite, covering a block of limestone
General
CategorySulfosalt minerals
Formula
(repeating unit)
Pb5Sb4S11
Strunz classification2.HC.15
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space groupPnam
Identification
LusterMetallic
StreakBlack
References[1][2]

References

  1. 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. Mineralienatlas
  3. http://webmineral.com/data/Boulangerite.shtml Webmineral data
  4. http://www.mindat.org/min-738.html Mindat
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