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Boulangerite

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File:Boulangeryt, Rumunia.jpg
Boulangerite, found in Romania

Boulangerite is a sulfosalt mineral, lead antimony sulfide, formula Pb5Sb4S11. It was named in 1837 honor of French mining engineer Charles Boulanger. It forms metallic grey monoclinic crystals.[1][2] Sometimes the crystals form a fine feathery mass which has been called plumosite.

References

  1. ^ http://webmineral.com/data/Boulangerite.shtml Webmineral data
  2. ^ http://www.mindat.org/min-738.html Mindat
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