EXAFS MEASUREMENT OF MOLTEN CUPROUS HALIDES

EXAFS measurement of molten CuCl and CuBr has been carried out near th e melting temperatures in order to study the partial structure. EXAFS oscillation was clearly observed and the structural parameters for the nearest neighboring Cu-halogen pairs were obtained from standard curv e fit analyses. The obtained Cu-halogen distance is, however, about 0. 1A shorter than the distance obtained from neutron diffraction measure ment with isotopic substitution. The result may suggest cluster format ion such as a CuX trimer (X = Cl, Br) in molten cuprous halides.