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  Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel

Wyżga, P., Veremchuk, I., Bobnar, M., Koželj, P., Klenner, S., Pöttgen, R., et al. (2020). Structural Peculiarities and Thermoelectric Study of Iron Indium Thiospinel. Chemistry – A European Journal, 26, 5245-5256. doi:10.1002/chem.201905665.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-4E02-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-4E08-B
Genre: Journal Article

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 Creators:
Wyżga, Paweł1, Author              
Veremchuk, Igor2, Author              
Bobnar, Matej1, Author              
Koželj, Primož1, Author              
Klenner, Steffen3, Author
Pöttgen, Rainer3, Author
Leithe-Jasper, Andreas4, Author              
Gumeniuk, Roman3, Author
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863411              
3External Organizations, ou_persistent22              
4Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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Free keywords: indium thiospinels, iron, phase diagrams, spinel phases, thermoelectric properties
 Abstract: The homogeneity range of ternary iron indium thiospinel at 873 K was investigated. A detailed study was focused on two distinct series (y=z): 1) a previously reported charge-balanced (In0.67+0.33y□0.33−0.33y)tetr[In2−zFez]octS4 (A1-series; □ stands for vacancy; the abbreviations “tetr” and “oct” indicate atoms occupying tetrahedral 8a and octahedral 16d sites, respectively) and 2) a new charge-unbalanced (In0.67+y□0.33−y)tetr[In2−zFez]octS4 (A2-series). Fe atoms were confirmed to exclusively occupy an octahedral position in both series. An unusual reduction of the unit cell parameter with increasing Fe content is explained by differences in the ionic radii between Fe and In, as well as by an additional electrostatic attraction originating from charge imbalance (latter only in A2-series). The studied compound is an n-type semiconductor, and its charge carrier concentration increases or decreases for larger Fe content within the A1- and A2-series, respectively. The thermal conductivity κtot is significantly reduced upon increasing vacancy concentration, whereas the change of power factor is insufficient to drastically improve the thermoelectric figure of merit. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

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Language(s): eng - English
 Dates: 2020-04-062020-04-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/chem.201905665
 Degree: -

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Title: Chemistry – A European Journal
  Other : Chem. – Eur. J.
  Other : Chem. Eur. J.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 26 Sequence Number: - Start / End Page: 5245 - 5256 Identifier: ISSN: 0947-6539
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058