Ionic Conductivity of Yttrium Fluoride and Lutetium Fluoride

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Science  22 Jun 1973:
Vol. 180, Issue 4092, pp. 1276-1277
DOI: 10.1126/science.180.4092.1276


At the transitions from the low-temperature orthorhombic forms of lutetium fluoride and yttrium fluoride to the high-temperature hexagonal forms, there are increases of several orders of magnitude in the ionic conductivities. In the high-temperature phases the conductivities are comparable to those of typical ionic melts. These fluoride compounds are therefore solid electrolytes.