Synthesis, crystal structure and magnetic properties of an unexpected new coordination Cu(II) compound, containing two different phosphato-bridged dinuclear units; [Cu2(phen)2(μ-H2PO4-O,O′)2(H2PO4)2][Cu2(phen)2(μ-H2PO4-O,O′)(μ-H2PO4-O)(μ-HPO4-O)]2(H2O)9(phen = 1,10-phenanthroline)