Chemical Formula: Pb(Sb,As)2S4
Help on Composition: Composition: Molecular Weight = 536.82 g
 
Sulfur 23.89 % S 0.00 % 0.00 %
Arsenic 12.56 % As 0.00 % 0.00 %
Antimony 24.95 % Sb 0.00 % 0.00 %
Lead 38.60 % Pb 0.00 % 0.00 %

100.00 %
 
Help on Empirical Formula: Empirical Formula: PbSb1.1As0.9S4
Help on Environment: Environment: Low-temperature hydrothermal origin, in marbles
Help on Locality: Locality: At Madoc, Ontario, Canada.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jean Etienne Guettard (17-15-1786), French geologist
Help on Synonym: Synonym: