Roman Gajda, Sławomir Podsiadło, Cezariusz Jastrzębski, Piotr Dłużewski and Krzysztof Woźniak
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引用次数: 0
摘要
利用 Ag2S 催化的化学气相传输法合成了线性尺寸约为 0.1 mm 的 Sn3S4 单晶。利用单晶 X 射线衍射法确定了这种新型混合价硫化锡的晶体结构。该晶体具有规则的 Fdm 空间群对称性，单胞参数 a = 10.5018(1) Å，单胞中有 8 个 Sn3S4 式单元。Sn3S4 结构中有两种类型的 Sn 原子。它们的区别在于配位 S 原子的数目。对原子盆的积分显示，八面体排列的硒原子的电荷为 +1.27e ，四面体排列的硒原子的电荷为 +1.54e 。硫原子的综合电荷等于-1.02e。透射电子显微镜图像显示出与 X 射线精细结构的理想匹配。
Single crystals of Sn3S4 of about 0.1 mm in linear size were synthesized by using the method of chemical vapour transport catalyzed by Ag2S. The crystal structure of this new mixed-valence tin sulfide was established using single-crystal X-ray diffraction. The crystal has a regular Fdm space group symmetry with the unit cell parameter a = 10.5018(1) Å and eight Sn3S4 formula units in the unit cell. Two types of Sn atoms are present in the structure of Sn3S4. They differ by the number of coordinated S atoms. Integration of atomic basins revealed that the charge at Sn atoms with the octahedral arrangement is +1.27e, and that at the tetrahedral is +1.54e. The sulfur atom has an integrated charge equal to −1.02e. Transmission electron microscopy images show ideal matching with the X-ray refined structure.
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