 3 ) , zinkenite , jamesonite , and boulangerite . Antimony pentasulfide is non @-@ stoichiometric and features antimony in the + 3 oxidation state and S @-@ S bonds . Several thioantimonides are known , such as [ Sb 
 3 ) , zinkenite , jamesonite , and boulangerite . Antimony pentasulfide <a href='drop_aux' title='1'><mark>is</mark></a>non @-@ stoichiometric and <a href='uninflect' title='2'><mark>features</mark></a> antimony in the + 3 oxidation state and S @-@ S bonds . Several thioantimonides are known , such as [ Sb 
3 ) , zinkenite , jamesonite , and boulangerite . Antimony pentasulfide non @-@ stoichiometric and feature antimony in the + 3 oxidation state and S @-@ S bonds . Several thioantimonides are known , such as [ Sb