ChemInform Abstract: Alkali Cation Diffusion in the Channel System of Hexagonal Nepheline (K,Na,)Na₃[Al₃(Al,Si)Si₄O₁₆].

Abstract

-The sodium-rich nepheline of title is prepared from fused salts. It is shown that an exhaustive model can be developed to explain the dielectric behavior and ionic conductivity as observed from impedance spectroscopy carried out on pressed powder pellets. Furthermore, X-ray diffraction data from a polycrystalline sample confirm the space group P6 3 .

Fundamentals of Impedance Spectral Analysis Applied to Determine Permittivity of Dielectric Particles

“…11 A new approach needs to be developed for interpretation of impedance spectra for mixed conducting systems. Other factors affecting the reliability of such measurements include size, shape, agglomeration, and sedimentation of the particles.…”

“…Introduction of conductivity in the slurry makes these problems even more challenging. 11 A new approach needs to be developed for interpretation of impedance spectra for mixed conducting systems.…”