Preparation, Transport Properties, and Structure Analysis by Resonant X-ray Scattering of the Type I Clathrate Cs 8 Cd 4 Sn 42

作者：Angus Paul Wilkinson, Cora Lind, RICHARD A. YOUNG, S. D. Shastri, P. L. Lee, George S. Nolas · 发表于：Chemistry of Materials · 年份：2002 · DOI：10.1021/cm0107880 · 被引用次数：57 · 研究领域：X-ray Diffraction in Crystallography、Crystal Structures and Properties、Zeolite Catalysis and Synthesis

Structural and transport properties of Cs 8 Cd 4 Sn 42 are reported. Cs 8 Cd 4 Sn 42 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.