A phenomenological analysis of radiative V=>P+gamma and P=>V+gamma
decays is performed with the purpose of determining the gluonic content
of the eta and eta' wave functions.
Our results show that there is no evidence for a gluonium contribution in the eta:Z 2 =0.00+-0.07, while for the eta' we get Z 2 =0.04+-0.09.
In terms of a mixing angle description this corresponds to phi_P=41.4+-1.3 degrees and | phi_G | =12+-13 degrees.
In addition, the eta-eta' mixing angle is found to be phi_P=41.5+-1.2 degrees if we don't allow for a gluonium component.