Registre de correu electrònic: A triclinic polymorph of bis­(μ(2)-ethane­thiol­ato)-1:2κ(2) S:S;3:4κ(2) S:S-(μ(4)-disulfido-1:2:3:4κ(4) S:S:S′:S′)tetra­kis­[tricarbonyl­iron(II)](2 Fe—Fe)