Electron paramagnetic resonance studies of metal ion impurities in the
perovskite titanate PbTiO3 are presented, Results for Pt+3, Mn+4, and
Cu+2 are given, and near-neighbor superhyperfine structure (shfs) spl
ittings for the first Ph shell are reported for these ions at low temp
erature, The relation between the shfs and the local structure of the
ion is discussed.