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Revealing uncommon transport in the previously unascertained very low cation clathrate-I Eu2Ga11Sn35

Published

Author(s)

Wilarachchige Gunatilleke, Winnie Wong-Ng, Peter Zavalij, Mingjian Zhang, Yu-Sheng Chen, George S. Nolas

Abstract

Inorganic clathrate-I compositions, materials that are of interest for a variety of different applications typically contain fully occupied cation sites. Herein, we report on the transport properties of single-crystal clathrate-I Eu2Ga11Sn35, the sole example of a very low cation concentration clathrate-I material with atypical transport properties that are directly attributable to the structure and stoichiometry. The framework crystallographic positions are fully occupied with no vacancies or superstructure, whereas Eu partially occupies both the 2a and 6d crystallographic sites with one Eu in each site per unit cell. We provide quantitative analyses of our temperature-dependent Hall, resistivity and Seebeck coefficient measurements in describing the transport in a previously unobtained composition emphasizing the uncommon properties that can be realized by very low cation clathrate-I materials.
Citation
CrystEngComm
Volume
25

Keywords

Type-I low cation clathrate, thermoelectric, Eu2Ga11Sn35, uncommon transport properties

Citation

Gunatilleke, W. , Wong-Ng, W. , Zavalij, P. , Zhang, M. , Chen, Y. and Nolas, G. (2023), Revealing uncommon transport in the previously unascertained very low cation clathrate-I Eu2Ga11Sn35, CrystEngComm, [online], https://doi.org/10.1039/d2ce01026g , https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934383 (Accessed July 23, 2024)

Issues

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Created February 13, 2023, Updated April 24, 2023