  We report on the iron K-alpha line properties of a sample of Seyfert galaxies
observed with the XMM-Newton EPIC pn instrument. Using a systematic and uniform
analysis, we find that complexity at iron-K is extremely common in the XMM
spectra. Once appropriate soft X-ray absorption, narrow 6.4 keV emission and
associated Compton reflection are accounted for, ~75 of the sample show an
improvement when a further Gaussian component is introduced. The typical
properties of the broad emission are both qualitatively and quantitatively
consistent with previous results from ASCA. The complexity is in general very
well described by relativistic accretion disk models. In most cases the
characteristic emission radius is constrained to be within ~50 R_g, where
strong gravitational effects become important. We find in about 1/3 of the
sample the accretion disk interpretation is strongly favoured over competing
models. In a few objects no broad line is apparent. We find evidence for
emission within 6 R_g in only two cases, both of which exhibit highly complex
absorption. Evidence for black hole spin based on the X-ray spectra therefore
remains tentative.
