A study of low-energy guest phonon modes in clathrate-II Na(x)Si136 (x = 3, 23, and 24).

Abstract

Single-crystal x-ray diffraction from clathrate-II Na(x)Si(136) (x = 24) prepared by a new technique reveals the exceptionally large Na@Si(28) atomic displacement parameter (U(eq)) is strongly temperature dependent, and can be attributed to low-energy rattling modes associated with the Na guest. Inelastic neutron scattering (INS) spectra collected from Na(x… (More)
DOI: 10.1088/0953-8984/22/35/355401

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@article{Beekman2010ASO, title={A study of low-energy guest phonon modes in clathrate-II Na(x)Si136 (x = 3, 23, and 24).}, author={Marian Beekman and Ralph Hermann and A M{\"o}chel and Fanni Jur{\'a}nyi and G. S. Nolas}, journal={Journal of physics. Condensed matter : an Institute of Physics journal}, year={2010}, volume={22 35}, pages={355401} }