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  The Clathrate Ba8-xSi46 Revisited: Preparation Routes, Electrical and Thermal Transport Properties

Castillo, R., Schnelle, W., Bobnar, M., Burkhardt, U., Böhme, B., Baitinger, M., et al. (2015). The Clathrate Ba8-xSi46 Revisited: Preparation Routes, Electrical and Thermal Transport Properties. Zeitschrift für anorganische und allgemeine Chemie, 641(2), 206-213. doi:10.1002/zaac.201500001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-BFB6-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-4A13-7
Genre: Journal Article

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 Creators:
Castillo, Rodrigo1, Author              
Schnelle, Walter2, Author              
Bobnar, Matej1, Author              
Burkhardt, Ulrich3, Author              
Böhme, Bodo4, Author              
Baitinger, Michael5, Author              
Schwarz, Ulrich6, Author              
Grin, Yuri7, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
3Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
4Bodo Böhme, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863408              
5Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863416              
6Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              
7Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Abstract: The clathrate-I Ba8-xSi46 was manufactured from BaSi2 and a-Si by high-pressure high-temperature synthesis at 5 GPa and 900 degrees C and by redox reaction from Ba4Li2Si6. The transport properties were measured on specimens from the high-pressure high-temperature synthesis. The composition of the Ba8-xSi46 phase [space group Pm (3) over bar n, a = 10.3051(1)angstrom] corresponds to x = 0.8(2) according to the refined lattice parameter, the value determined from full-profile refinement of powder X-ray diffraction data amounts to x = 0.73(1), and the chemical analysis results in x = 1.0(1), yielding the average composition Ba7.2(2)Si46. The electrical transport properties of the phase with x = 0.8 were determined in the temperature range 2-300 K using a polycrystalline bulk specimen. The material is a metallic conductor with rho(300 K) = 3.3 mu Omega m and S(300 K) = -6.8 mu V K-1. The thermal conductivity shows a relatively large -for an intermetallic clathrate value of about 8 W.K-1 m(-1).

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Language(s): eng - English
 Dates: 2015-02-15
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000351444500012
DOI: 10.1002/zaac.201500001
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Title: Zeitschrift für anorganische und allgemeine Chemie
  Other : Journal of Inorganic and General Chemistry
  Other : J. Inorg. Gen Chem.
  Abbreviation : Z. Anorg. Allg. Chem.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 641 (2) Sequence Number: - Start / End Page: 206 - 213 Identifier: ISSN: 0044-2313
CoNE: https://pure.mpg.de/cone/journals/resource/954925453895