The title compound, namely octaaquaytterbium(III) aquanonachlorotricadmate(II) hexahydrate, [Yb(H(2)O)(8)][Cd(3)Cl(9)(H(2)O)].6H(2)O, was prepared by evaporation at 278 K from an aqueous solution of the ternary system YbCl(3)-CdCl(2)-H(2)O and was characterized by elemental chemical analysis and by X-ray powder and single-crystal diffraction studies. The crystal structure can be viewed as being built from layers of double chains of CdCl(6) and CdCl(5)(H(2)O) octahedra separated by antiprismatic [Yb(H(2)O)(8)](3+) cations. The stabilization of the structure is ensured by O-H.O and O-H.Cl hydrogen bonds. A comparison with the structures of SrCd(2)Cl(6).8H(2)O and CeCd(4)Cl(11).13H(2)O is presented.