Abstract
A new alkali tin(II) halide compound, Na3Sn2F6Cl, is synthesized by hydrothermal method. This compound crystallizes trigonally in space group of R-3c (167), and processes a zero-dimensional (0D) structure consisted of Na+ cations, Cl− anions and the isolated [SnF3]- trigonal pyramids in which the stereochemically active 5s2 lone pair electrons are attached to the Sn2+ cations. Interestingly, the [SnF3]− trigonal pyramids are parallel arranged in the a-b plane, while oppositely arranged in line with rotation along the c- axis. Moreover, the energy bandgap, thermal stability and electronic structure of Na3Sn2F6Cl are characterized and the results reveal that this compound has and indirect bandgap of 3.88eV and is stable under 270°C.
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