Chemical Formula: (Cu,Zn,Ag)12(As,Sb)4(Se,S)13
Help on Composition: Composition: Molecular Weight = 2042.97 g
 
Sulfur 5.10 % S 0.00 % 0.00 %
Copper 22.40 % Cu 0.00 % 0.00 %
Zinc 11.52 % Zn 0.00 % 0.00 %
Arsenic 11.00 % As 0.00 % 0.00 %
Selenium 37.68 % Se 0.00 % 0.00 %
Silver 6.34 % Ag 0.00 % 0.00 %
Antimony 5.96 % Sb 0.00 % 0.00 %

100.00 %
 
Help on Empirical Formula: Empirical Formula: Cu7.2Zn3.6Ag1.2As3SbSe9.75S3.25
Help on Environment: Environment: As late stage deposits in veins cutting granite
Help on Locality: Locality: From Chameane, Puy-de-Dome, France.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Roger Giraud, of the electron microprobe laboratory of the B.R.G.M.-C.N.R.S. in Orleans, France
Help on Synonym: Synonym: