Crystals of a Vanthoffite mineral, NaMn(SO), grown from an aqueous solution, belong to a monoclinic system, P2/c, Z = 2, at ambient temperature. Thermal analysis indicates a phase transition at 455 °C, which was substantiated by in situ variable-temperature powder X-ray diffraction. The structure is orthorhombic (Pmmm) after the phase transition and reverts to the monoclinic system upon cooling. Variable-temperature ionic conductivity measurements show a significantly higher value (∼10 S cm) beyond the phase transition temperature.
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| http://dx.doi.org/10.1021/acs.inorgchem.7b00802 | DOI Listing |
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