Vanadium (V)-C-60 mixed clusters were produced by two laser vaporization methods. In the mass spectra of cationic V-n(C-60)(m)(+), the abundant clusters were produced at the composition of (n,m>=(1,1), (1,2), (2,3), (3-4,4), and (5,5). This pattern is explicable in terms of a multiple dumbbell structure; V atom and C-60 are alternatively piled up. The ionization energy and the reactivity of the dumbbell clusters toward O-2 and CO show V-1(C-60)(2) takes a structure of V-1(eta(6) -C-60)(2). (C) 1997 American Institute of Physics.