  We have investigated the structural, electronic, and magnetic properties of
the pyrochlore iridates Eu2Ir2O7 and Pr2Ir2O7 using a combination of resonant
elastic x-ray scattering, x-ray powder diffraction, and resonant inelastic
x-ray scattering (RIXS). The structural parameters of Eu2Ir2O7 have been
examined as a function of temperature and applied pressure, with a particular
emphasis on regions of the phase diagram where electronic and magnetic phase
transitions have been reported. We find no evidence of crystal symmetry change
over the range of temperatures (~6 to 300 K) and pressures (~0.1 to 17 GPa)
studied. We have also investigated the electronic and magnetic excitations in
single crystal samples of Eu2Ir2O7 and Pr2Ir2O7 using high resolution Ir
L3-edge RIXS. In spite of very different ground state properties, we find these
materials exhibit qualitatively similar excitation spectra, with crystal field
excitations at ~3-5 eV, spin-orbit excitations at ~0.5-1 eV, and broad
low-lying excitations below ~0.15 eV. In Eu2Ir2O7 we observe highly damped
magnetic excitations at ~45 meV, which display significant momentum dependence.
We compare these results with recent dynamical structure factor calculations.
