A　3-D　supramolecular　hybrid　{[La(EPC)(3)(H2O)(3)](2)(Pb6I18)}(n)　(EPC+　=　N-ethyl-pyridium-4-carboxylate)　(1)　has　been　structurally　determined,　which　assume　significance　for　its　incorporating　lanthanide　metal-carboxylic　coordination　polycation　into　polymeric　iodoplumbate　to　get　heterometallics.　1　consists　of　1-D　(Pb6I18)(n)(6n-)　zigzag-like　anion　chains　with　lanthanide　metalcarboxylic　[La(EPC)(3)(H2O)(3)](n)(3n+)　polycations,　which　arrange　in　a　criss-cross　configuration.　C-H　center　dot　center　dot　center　dot　I　and　C-H　center　dot　center　dot　center　dot　O　hydrogen　bonds　among　inorganic　anions　and　polycations　contribute　to　the　formation　of　a　3-D　supramolecular　framework.　Moreover,　the　framework　displays　an　absorption　edge　at　2.46　eV　which　is　comparable　to　PbI2＇s　absorption　edge.　(c)　2012　Elsevier　B.V.　All　rights　reserved.