Chemical Formula: Na2(Sb,As)8S13·2(H2O)
Help on Composition: Composition: Molecular Weight = 1426.04 g
 
Hydrogen 0.28 % H 0.00 % 0.00 %
Oxygen 2.24 % O 0.00 % 0.00 %
Sodium 3.22 % Na 0.00 % 0.00 %
Sulfur 29.23 % S 0.00 % 0.00 %
Arsenic 5.25 % As 0.00 % 0.00 %
Antimony 59.76 % Sb 0.00 % 0.00 %

99.98 %
 
Help on Empirical Formula: Empirical Formula: Na2Sb7AsS13·2(H2O)
Help on Environment: Environment: Sedimentary borate deposits
Help on Locality: Locality: Baker Mine, Boron, Kern Co. California.. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for J. M. Gerstley (1907-), President, Pacific Coast Borax Company
Help on Synonym: Synonym: