Preparation, transport properties, and structure analysis by resonant X-ray scattering of the type I clathrate Cs8Cd4Sn42
Preparation, transport properties, and structure analysis by resonant X-ray scattering of the type I clathrate Cs8Cd4Sn42
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DOI：
10.1021/cm0107880
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发表时间：
2002-02
影响因子：
8.6
通讯作者：
A. Wilkinson;Cora Lind;R. Young;S. Shastri;P. Lee;G. Nolas
中科院分区：
文献类型：
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作者：
A. Wilkinson;Cora Lind;R. Young;S. Shastri;P. Lee;G. Nolas
报道了Cs_8Cd_4Sn_42的结构和输运性质。Cs 8 Cd 4Sn 42具有对于结晶固体而言异常低的热导率（在室温下为1 W m-1 K-1）。这种低晶格热导率与铯在tetrakaidecahedra空腔中的嘎嘎作响有关，如由铯在tetrakaidecahedra中的大原子位移参数所示。共振X射线粉末衍射测量表明，所有的镉是位于三个不等价的框架网站之一。没有证据表明材料中存在任何框架空缺。
Structural and transport properties of Cs8Cd4Sn42 are reported. Cs8Cd4Sn42 has a thermal conductivity that is unusually low for a crystalline solid (1 W m-1 K-1 at room temperature). This low lattice thermal conductivity is associated with the rattling of cesium in the tetrakaidecahedral cavities, as indicated by the large atomic displacement parameters of Cs in the tretrakaidecahedra. Resonant X-ray powder diffraction measurements indicate that all of the cadmium is located on one of three inequivalent framework sites. There is no evidence for any framework vacancies in the material.