MOSSBAUER AND NEUTRON-DIFFRACTION STUDIES ON LI6FECL8

On Suzuki-Type Li6FeCl8 Mossbauer spectra and neutron powder diffraction data are presented. The Suzuki-type structure (space group Fm3mBAR, Z = 4, 1031.11(1) pm) was supported refining by the Rietveld method (program PROFIL) to a final R(I) = 6.8%. The Mossbauer spectra confirm the ideal octahedral coordination of the Fe2+ ions (no quadrupole splitting). The isomer shift of 1.097(1) mm s-1 at 295 K resembles those of other ferrous chlorides. At temperatures above the phase transition to deficient NaCl-type solid solution the half-width of the Mossbauer signal strongly increases.