A new 3-D coordination polymer containing both 3d and 4f ions has been designed. Its chemical formula is La-2[Cu(pba)](3)(H2O)(8), 8H(2)O. It crystallizes in the quadratic system, space group /41/a with a = 42.4947(9) angstrom, c = 16.3378(3) angstrom, and Z = 16. Its crystal structure can be described as a 3-D molecular framework exhibiting a complex network of interconnected zigzaglike channels. Once crystallization water molecules are removed, this compound presents a high potential porosity and a low density. The porosity has been evaluated using Connolly's algorithm.