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Issue 39, 2017
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Na6Si3S8O: the first example of a sulfide silicate exhibiting unusual tri-polymerized [Si3S8O]6− units without S–O bonds

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Abstract

Generally, sulfur is inclined to combine with oxygen to form sulfate ions in a solid-state reaction. Interestingly, an extraordinary sulfide silicate, Na6Si3S8O, was successfully obtained in a vacuum-sealed silica tube for the first time. Its crystal structure features novel 1D straight chains formed by the interconnection of tri-polymerized [Si3S8O]6− and [Na4S5O]11− units, demonstrating the first sulfide silicate exhibiting S–Na–O and S–Si–O connections without S–O bonds. Moreover, Na6Si3S8O is also verified as a promising birefringent material owing to its large birefringence (Δn = 0.215–0.094 from 0.3 to 4.0 μm).

Graphical abstract: Na6Si3S8O: the first example of a sulfide silicate exhibiting unusual tri-polymerized [Si3S8O]6− units without S–O bonds

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Publication details

The article was received on 23 Aug 2017, accepted on 10 Sep 2017 and first published on 11 Sep 2017


Article type: Communication
DOI: 10.1039/C7DT03125D
Citation: Dalton Trans., 2017,46, 13356-13359
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    Na6Si3S8O: the first example of a sulfide silicate exhibiting unusual tri-polymerized [Si3S8O]6− units without S–O bonds

    K. Wu, Z. Yang and S. Pan, Dalton Trans., 2017, 46, 13356
    DOI: 10.1039/C7DT03125D

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