Structural and Thermoelectric Properties of Pb4In2.6Bi3.4Se13

Published

July 2, 2021

Author(s)

Winnie Wong-Ng, J Guo, Yonggao Yan, James A. Kaduk

Abstract

Quaternary selenide, Pb4In2.6Bi3.4Se13 (x = 2.4 member of the Pb4(InxBi6-xSe13 solid solution), was synthesized by a solid-state technique, and its structure was determined using powder X-ray diffraction (XRD). Pb4In2.6Bi3.4Se13 crystallizes in the orthorhombic space group Pbam (No. 55) with Z = 4. Lattice parameters and calculated density were determined to be a = 22.152(5) Å, b = 27.454(5) Å, and c = 4.1354(6) Å, V = 2515.0(11) Å3, and Dx = 7.490 g cm−3. The structure consists of Z-shaped ribbon units and corner-shared infinite one-dimensional [InSe4]∞ chains running parallel to the c-axis. The chains and ribbons are further connected by Pb atoms to form a three-dimensional network. Pb atoms are situated in the center of bicapped trigonal prisms. The compound exhibits a semiconductor feature. The Seebeck coefficient of Pb4In2.6Bi3.4Se13 was found to be −180 μV K−1 at 295 K and −380 μV K−1 at 600 K. Combining the values of Seebeck coefficient, electrical conductivity, and thermal conductivity yield a figure of merit, ZT, of about 0.175 at 700 K. The powder XRD pattern of Pb4In2.6Bi3.4Se13 was also determined.

Citation

Powder Diffraction

Volume

36

Issue

3

Pub Type

Journals

Download Paper

https://doi.org/10.1017/S0885715621000385

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Keywords

Pb4In2.6Bi3.4Se13, thermoelectric material, thermoelectric property measurements, crystal structure, powder X-ray diffraction pattern.

Citation

Wong-Ng, W. , Guo, J. , Yan, Y. and Kaduk, J. (2021), Structural and Thermoelectric Properties of Pb4In2.6Bi3.4Se13, Powder Diffraction, [online], https://doi.org/10.1017/S0885715621000385, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931804 (Accessed April 25, 2024)