A　6(5)center　dot　8　CdSO4-type　3-D　framework　built　by　hexa-Cu-II　sandwiched　polyoxotungstates　[Cu(en)(2)](2)-[Cu(deta)(H2O)](2)[Cu-6(en)(2)(H2O)(2)(B-alpha-GeW9O34)(2)]center　dot　6H(2)O　(1)　(en　=　ethylenediamine　and　deta　=　diethylenetriamine)　has　been　hydrothermally　synthesized　and　structurally　characterized　by　elemental　analysis,　IR　spectrometry,　thermogravimetric　analysis　and　single-crystal　X-ray　diffraction.　To　the　best　of　our　knowledge,　1　represents　the.　first　3-D　TMSP　with　6(5)center　dot　8　CdSO4　topology　in　polyoxometalate　chemistry.　Magnetic　measurements　performed　on　1　indicate　the　occurrence　of　ferromagnetic　interactions　within　the　copper　ions　and　the　coupling　constants　can　be　determined.