Preparation and Characterization of Sr, Ba Filled Type-I Ge Clathrate Single Crystals


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Sr or Ba filled type-I Ge clathrate single crystals were prepared using high pure elemental Ga, Ge, and Sr or Ba as the starting materials, and Ga as a flux. Powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), differential scanning calorimeter (DSC) were used to characterize the crystals, respectively. The results show that large and well-crystallized single crystals can be prepared under optimum synthesis condition. The composition of the crystals is in good agreement with the nominal composition (M8Ga16Ge30, M=Sr, Ba). Raman spectra of the single crystals were studied at room temperature and several of the Raman active vibrational modes in the crystals have been identified.



Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong




K. F. Cai et al., "Preparation and Characterization of Sr, Ba Filled Type-I Ge Clathrate Single Crystals", Key Engineering Materials, Vols. 336-338, pp. 896-899, 2007

Online since:

April 2007




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