Solid Electrolyte Behavior of NaMgF3: Geophysical Implications

See allHide authors and affiliations

Science  02 Nov 1979:
Vol. 206, Issue 4418, pp. 599-600
DOI: 10.1126/science.206.4418.599


In the solid state, NaMgF3 transforms smoothly with temperature into a solid electrolyte phase; the conductivity is 130 siemens per meter just below the melting point. The isostructural compound MgSiO3 should behave similarly under conditions obtaining in the earth's lower mantle, and so it is expected that the electrical conductivity in that region is ionic rather than electronic.