Transport, Thermomechanical, and Electrode Properties of Perovskite-Type $$ {\Left( {{\Hbox{L}}{{\Hbox{A}}_{0.{75} - X}}{\Hbox{S}}{{\Hbox{R}}_{0.{25} + X}}} \Right)_{0.{95}}}{\Hbox{M}}{{\Hbox{N}}_{0.{5}}}{\Hbox{C}}{{\Hbox{R}}_{0.{5} - X}}{\Hbox{T}}{{\Hbox{I}}_X}{{\Hbox{O}}_{{3} - }}_\Delta \Left( {X = 0 - 0.{5}} \Right) $$