One step at a time: A novel tridecanuclear Ag(I)(9)-Cu(II)(4) heterometallic cluster comprising four [Cu(phen)(2)](2+) units on the periphery and one interior [Ag(9)(mna)(8)](7-) cluster was synthesized in a stepwise manner and characterized. The interior [Ag(9)(mna)(8)](7-) cluster contains two unusual vertex-shared trigonal-bipyramidal silver polyhedra.
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