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Title: Structure and electrical transport properties of the ordered skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir)

Abstract

High-resolution powder neutron diffraction data collected for the skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir) reveal that these materials adopt an ordered skutterudite structure (space group R3-bar ), in which the anions are ordered in layers perpendicular to the [111] direction. In this ordered structure, the anions form two-crystallographically distinct four-membered rings, with stoichiometry Ge{sub 2}S{sub 2}, in which the Ge and S atoms are trans to each other. The transport properties of these materials, which are p-type semiconductors, are discussed in the light of the structural results. The effect of iron substitution in CoGe{sub 1.5}S{sub 1.5} has been investigated. While doping of CoGe{sub 1.5}S{sub 1.5} has a marked effect on both the electrical resistivity and the Seebeck coefficient, these ternary skutterudites exhibit significantly higher electrical resistivities than their binary counterparts. - Graphical abstract: The MGe{sub 1.5}S{sub 1.5} phases exhibit an ordered skutterudite structure, in which the anions form diamond-like four-membered Ge{sub 2}S{sub 2} rings.

Authors:
 [1]; ;  [1]
  1. Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS (United Kingdom)
Publication Date:
OSTI Identifier:
21128245
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 181; Journal Issue: 4; Other Information: DOI: 10.1016/j.jssc.2008.01.025; PII: S0022-4596(08)00041-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT COMPOUNDS; ELECTRIC CONDUCTIVITY; GERMANIDES; IRIDIUM COMPOUNDS; LAYERS; NEUTRON DIFFRACTION; RHODIUM COMPOUNDS; SEMICONDUCTOR MATERIALS; SPACE GROUPS; SULFIDES; THERMOELECTRIC PROPERTIES; TRIGONAL LATTICES

Citation Formats

Vaqueiro, Paz, Sobany, Gerard G, and Stindl, Martin. Structure and electrical transport properties of the ordered skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir). United States: N. p., 2008. Web. doi:10.1016/j.jssc.2008.01.025.
Vaqueiro, Paz, Sobany, Gerard G, & Stindl, Martin. Structure and electrical transport properties of the ordered skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir). United States. https://doi.org/10.1016/j.jssc.2008.01.025
Vaqueiro, Paz, Sobany, Gerard G, and Stindl, Martin. 2008. "Structure and electrical transport properties of the ordered skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir)". United States. https://doi.org/10.1016/j.jssc.2008.01.025.
@article{osti_21128245,
title = {Structure and electrical transport properties of the ordered skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir)},
author = {Vaqueiro, Paz and Sobany, Gerard G and Stindl, Martin},
abstractNote = {High-resolution powder neutron diffraction data collected for the skutterudites MGe{sub 1.5}S{sub 1.5} (M=Co, Rh, Ir) reveal that these materials adopt an ordered skutterudite structure (space group R3-bar ), in which the anions are ordered in layers perpendicular to the [111] direction. In this ordered structure, the anions form two-crystallographically distinct four-membered rings, with stoichiometry Ge{sub 2}S{sub 2}, in which the Ge and S atoms are trans to each other. The transport properties of these materials, which are p-type semiconductors, are discussed in the light of the structural results. The effect of iron substitution in CoGe{sub 1.5}S{sub 1.5} has been investigated. While doping of CoGe{sub 1.5}S{sub 1.5} has a marked effect on both the electrical resistivity and the Seebeck coefficient, these ternary skutterudites exhibit significantly higher electrical resistivities than their binary counterparts. - Graphical abstract: The MGe{sub 1.5}S{sub 1.5} phases exhibit an ordered skutterudite structure, in which the anions form diamond-like four-membered Ge{sub 2}S{sub 2} rings.},
doi = {10.1016/j.jssc.2008.01.025},
url = {https://www.osti.gov/biblio/21128245}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 4,
volume = 181,
place = {United States},
year = {Tue Apr 15 00:00:00 EDT 2008},
month = {Tue Apr 15 00:00:00 EDT 2008}
}