Synthesis, X-Ray and Neutron Diffraction Characterization and Ionic Conduction Properties of a New Oxothiomolybdate Li-Title compound (IV) crystallizes in the monoclinic space group C2/m with Z = 2 (single crystal XRD). The structure contains pillars of Li + ions and ring-shaped anions formed by four hydroxo-bridged [Mo 2 S 2 O 2 ] building blocks which encapsulate a central W V I O 6 octahedron. Pressed pellets of (IV) exhibit a good room temperature conductivity (σ = 10 −5 S/cm), while the ionic conductivity of single crystals is smaller by two orders of magnitude and is isotropic. It is suggested that the main path of conduction involves surface protons rather than bulk Li + ions.
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