Boulangerite Mineral Data

General Boulangerite Information
Chemical Formula:	Pb5Sb4S11
Composition:	Molecular Weight = 1,887.90 gm
	Antimony 26.44 % Sb
	Lead 54.88 % Pb
	Sulfur 18.68 % S
	______
	100.00 %
Empirical Formula:	Pb₅Sb_4.1S₁₁
Environment:	Low to moderate temperature hydrothermal veins.
IMA Status:	Valid Species (Pre-IMA) 1837
Locality:	Moli�res, Gard, Languedoc-Roussillon, France Link to MinDat.org Location Data.
Name Origin:	Named after the French mining engineer, C. L. Boulanger (1810-1849). Later name from an occurrence near Mullan, Idaho.
Name Pronunciation:	Boulangerite + Pronunciation
Synonym:	Mullanite