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Dear All, We are studying pyrite mineral chemistry with EPMA and SEM. We have found some tiny (less than 1 microns) elongated zones of Pb+Bi enrichment. We need a technique with higher resolution, like a scanning electron microscope of high resolution, in order to resolve the nature of this enrichment. We appreciate very much if anybody could inform us about any laboratory provided with this kind of microscope. Thank-you very much in advance Javi -------------------------------------------------------------------------- Francisco Javier Carrillo Rosúa Instituto Andaluz de Ciencias de la Tierra (Universidad de Granada-C.S.I.C.) Facultad de Ciencias. Avenida de Fuentenueva s/n 18002 Granada. ESPAÑA Tlfno: 958 248535; Fax: 958 243368 --------------------------------------------------------------------------