Since the first observation of the C60 molecule,researchers have been seeking other interesting structures with unique chemical properties and many interesting structures have been proposed.These include the Met-Cars (M8C12),Au20,Au32,Au42,B80,and both the neutral and charged B40-/0 cluster.Recently,a Volleyballene consisting of 60 carbon and 20 scandium atoms was proposed[1]and gained wide attention[2].This Volleyballene was the first buckyball to be spiked with metal atoms and is awaiting synthesis.If the Volleyballene SC20C60 does actually exist,it is expected that other early transition metals should be capable of forming molecules of a similar type,and might also display unusual stability.We have subsequently carried out a further study of 4d and 5d transition metals,and so far,have found two new stable Volleyballenes[3],Y20C60 and La20C60 molecular clusters that exhibit an unusual stability while retaining the volleyball-like shape.Both the Y20C60 and La20C60 molecules have Th point group symmetries and relatively large HOMO-LUMO gaps.In conjunction with recent findings in the scandium system,these observations establish the Volleyballene M20C60 molecules as general class of stable molecules in the fullerene family.