Chemical Formula: Cu++2As+++++2O7·3(H2O)
Help on Composition: Composition: Molecular Weight = 442.98 g
 
Hydrogen 1.37 % H 12.20 % H2O 0.00 %
Oxygen 36.12 % O 0.00 % 0.00 %
Copper 28.69 % Cu 35.91 % CuO 0.00 %
Arsenic 33.83 % As 51.89 % As2O5 0.00 %


100.01 % 100.00 %
 
Help on Empirical Formula: Empirical Formula: Cu2As2O7·3(H2O)
Help on Environment: Environment: Coatings on quartz
Help on Locality: Locality: Cap Garonne mine, Var, France.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Latin gemini, twins, in allusion to the usual character of the crystals
Help on Synonym: Synonym: Trichalcite