  We present a comparative study of the valence band electronic structure of Pd
based ternary chalcogenide superconductors Nb2Pd0.95S5, Ta2Pd0.97S6 and
Ta2Pd0.97Te6 using experimental photoemission spectroscopy and density
functional based theoretical calculations. We observe a qualitatively
similarity between valence band (VB) spectra of Nb2Pd0.95S5 and Ta2Pd0.97S6.
Further, we find a pseudogap feature in Nb2Pd0.95S5 at low temperature, unlike
other two compounds. We have correlated the structural geometry with the
differences in VB spectra of these compounds. The different atomic packing in
these compounds could vary the strength of inter-orbital hybridization among
various atoms which leads to difference in their electronic structure as
clearly observed in our DOS calculations.
