Na6Si3S8O: the first example of a sulfide silicate exhibiting unusual tri-polymerized [Si3S8O]6- units without S-O bonds
Na6Si3S8O: the first example of a sulfide silicate exhibiting unusual tri-polymerized [Si3S8O]6- units without S-O bonds
复制标题
Na6Si3S8O：硫化物硅酸盐的第一个例子，表现出不寻常的三聚[Si3S8O]6-单元，没有S-O键
DOI：
10.1039/c7dt03125d
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Pan Shilie
中科院分区：
文献类型：
--
作者：
Wu Kui;Yang Zhihua;Pan Shilie
通常，硫倾向于与氧联合收割机在固态反应中形成硫酸根离子。有趣的是，一个非凡的硫化物硅酸盐，Na 6Si 3S 8 O，首次在真空密封的石英管中成功地获得。它的晶体结构特征是由三聚的[Si 3S 8 O]6-和[Na 4S 5 O]11-单元互连形成的新型一维直链，证明了第一个呈现S-Na-O和S-Si-O连接而没有S-O键的硫化物硅酸盐。此外，Na_6Si_3S_8O具有很大的双折射率（0.3 ~ 4.0 μm范围内Δn = 0.215-0.094），是一种很有前途的双折射材料。
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).