A bis(disulfide)-bridged RuMo3S4 double-cubane cluster [{(Cp*Mo)(3)(mu(3)-S)(4)Ru}(mu(2)-eta(2):eta(1)-S-2)](2)[PF6](2) (2, Cp* = eta(5)-C5Me5) is readily available from cluster [(Cp*Mo)(3)(mu(3)-S)(4)RuH2(PPh3)][PF6] (1) and S-8. The reactions of cluster 2 with [M(PPh3)(4)] (M = Pd, Pt) give rise to the formation of a new family of nona- or decanuclear mixed-metal sulfide clusters, [{(Cp*Mo)(3)(mu(3)-S)(4)Ru}(2)(mu(3)-S)(2){Pd(S)(PPh3)}][PF6](2) (3), [{(Cp*Mo)(3)(mu(3)-S)(4)Ru}(2)(mu(3)-S)(2){(Pd(PPh3))(2)(mu(2)-S)}][PF6] (2) (4), and [{(Cp*Mo)(3)(mu(3)-S)(4)Ru}(2)(mu(3)-S)(2){Pt(PPh3)(2)}][PF6](2) (5), with two RuMo3S4 cubane units, the structures of which have been determined by X-ray diffraction studies.