  We report on a high statistics lattice QCD calculation of the mass of the eta
and eta' mesons using ASQTAD improved staggered fermions. The calculation used
two ensembles with different lattice spacings and pion masses. We also report
results for eta-eta' mixing. The results are in satisfactory agreement with
other lattice calculations using other fermion formulations and with
experiment, given the the unphysical quark masses used. We see no evidence of
abnormal behaviour at the lattice spacings studied.
