A heteropolymetallic coordination polymer containing alkaline-earth (Ae) cation, lanthanide (Ln) cation and alkali (A) cation

► [Ba2Tb4Na4(pdc)10(H2O)24]·(H2O)11, H2pdc = pyridine-2,6-dicarboxylic acid has been synthesized. ► Three different kinds of metal cations could be connected simultaneously by a pdc2− ligand with coordination mode i. ► Sodium hydroxide has taken part in the coordination under higher temperature and pressure.