  We introduce new correlation consistent effective core potentials (ccECPs)
for the elements I, Te, Bi, Ag, Au, Pd, Ir, Mo, and W with $4d$, $5d$, $6s$ and
$6p$ valence spaces. These ccECPs are given as a sum of spin-orbit averaged
relativistic effective potential (AREP) and effective spin-orbit (SO) terms.
The construction involves several steps with increasing refinements from more
simple to fully correlated methods. The optimizations are carried out with
objective functions that include weighted many-body atomic spectra,
norm-conservation criteria, and spin-orbit splittings. Transferability tests
involve molecular binding curves of corresponding hydride and oxide dimers. The
constructed ccECPs are systematically better and in a few cases on par with
previous effective core potential (ECP) tables on all tested criteria and
provide a significant increase in accuracy for valence-only calculations with
these elements. Our study confirms the importance of the AREP part in
determining the overall quality of the ECP even in the presence of sizable
spin-orbit effects. The subsequent quantum Monte Carlo (QMC) calculations point
out the importance of accurate trial wave functions which in some cases (mid
series transition elements) require treatment well beyond single-reference.
