Lead hexacyanoferrate(II) tetrahydrate: Crystal structure, FTIR spectroscopy and thermal decomposition studies

► Crystal structure of Pb2[Fe(CN)6]·4H2O was solved from synchrotron powder XRD. ► We use direct methods to solve the structure and refined it by the Rietveld method. ► Pb2[Fe(CN)6]·4H2O crystallizes in the monoclinic crystal system, space group P21/n. ► The Fe2+ cation is octahedrally coordinated and the Pb2+ cation is five coordinated. ► The thermal decomposition of Pb2[Fe(CN)6]·4H2O in air was studied.