I am looking for - isotopically pure metals : Pb, Mo, W - the address of a vendor of chemicals in US : K&K Thanks for any help *********************************** Jean-Charles ABBE Ecole des Mines de Nantes Laboratoire SUBATECH BP 20722 44 307 NANTES CEDEX 3 Tel 33 (0)2 51 85 84 01 Fax 33 (0)2 51 85 84 79 ABBE@SUBATECH.IN2P3.FR