ChemInform Abstract: Synthesis, X‐Ray and Neutron Diffraction Characterization and Ionic Conduction Properties of a New Oxothiomolybdate Li₃ [Mo₈S₈O₈(OH)₈{HWO₅ (H₂O)}]×18H₂O.

Abstract

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.

Unconventional Dexter–Silverton Type Manganese Heteropolytungstate [Mn7(MnW12O42(OH)4·8H2O)] Hollow Microsphere: Synthesis, Crystal Structure, Growth Mechanism, and Optical Property Study

“…It was observed that the samples are highly resistive (sheet resistance ∼18 GΩ/sq). The result is within the expected range as reported in an earlier study by Dolbecq et al, where they also found such high resistance of the polytungstate material.…”