IONIC CONDUCTIVITIES OF MX-K(OR RB)X-CSX-BAX(2) GLASSES (M=LI, CU OR AG, X=CL, BR OR I) COMPOSED OF SINGLE-X

For the recently developed MX-K(or Rb)X-Cs-BaX(2) glasses (M=Li, Cu or Ag; X=C1, Br or I) the compositional dependence of ionic conductivity has been examined. In the M species dependence examined for 55MBr.20KBr.20CsBr.5BaBr(2) glasses (M=Li, Cu or Ag) the conductivity increases in the order of M=Li, Cu and Ag. In the X species dependence examined for 55LiX.20KX.20CsX.5BaX(2), 55CuX.24K (or Rb) X.6CsX.15BaX(2) and 55AgX.20KX.20CsX.5BaX(2) glasses the conductivity of the LiX and AgX based glasses increases in the order of X=Cl, Br and I, while the conductivity of the CuX based glasses increases in the order of X=I Br and C1. The most conductive glass in the examined series is a 55CuCl.24KCl.6CsCl.15BaCl(2) glass. These results are discussed from the standpoint of the local structures of MX components.