In the present study, we report a detail investigation on the effect of insolubility of Ag 40% doping on the structural and magnetic properties of LCMO-Ag compound prepared by solid-state reaction. The analysis of X-ray diffraction for our samples using Rietveld refinement showed that they crystallize in the orthorhombic structure with Pnma space group. We have shown that this compound has a secondary phase (Ag metallic phase). The detailed analyses of Hirshfeld surface and fingerprint plots provide insight into the nature of intermolecular interactions in the title compound. Magnetization measurements versus temperature at different magnetic fields have shown the presence of two magnetic transitions. This result was confirmed previously in the crystallographic study. This phase exhibits magnetic properties, which has a Curie temperature (Tc) which is lower than the Curie temperature of the FM-PM transition. The critical properties of perovskite manganite LCMO-Ag around of transition with Tc = 230 K is investigated through various techniques such as modified Arrott plot, Kouvel-Fisher method, and critical isotherm analysis. Moreover, the critical exponents also obeyed the single scaling equation of M(H, epsilon)vertical bar epsilon vertical bar (beta) = f(+/-) (H vertical bar epsilon vertical bar(-(beta+gamma))). We find that the critical exponent for LCMO-Ag is close to that theoretically predicted for mean field tricritical model. (C) 2017 Elsevier B.V. All rights reserved.