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  The untypical high-pressure Zintl phase SrGe6

Schwarz, U., Castillo, R., Hübner, J. M., Wosylus, A., Prots, Y., Bobnar, M., et al. (2020). The untypical high-pressure Zintl phase SrGe6. Zeitschrift für Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 75(1-2), 209-216. doi:10.1515/znb-2019-0197.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-DBE5-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-0D21-7
Genre: Journal Article

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 Creators:
Schwarz, Ulrich1, Author              
Castillo, Rodrigo2, Author              
Hübner, Julia M.2, Author              
Wosylus, Aron2, Author              
Prots, Yurii3, Author              
Bobnar, Matej2, Author              
Grin, Yuri4, Author              
Affiliations:
1Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
3Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
4Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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Free keywords: germanium, high-pressure synthesis, strontium, Zintl phase
 Abstract: The binary strontium germanide SrGe6 was synthesized at high-pressure high-temperature conditions of approximately 10 GPa and typically 1400 K before quenching to ambient conditions. At ambient pressure, SrGe6 decomposes in a monotropic fashion at T = 680(10) K into SrGe2 and Ge, indicating its metastable character. Single-crystal X-ray diffraction data indicate that the compound SrGe6 adopts a new monoclinic structure type comprising a unique three-dimensional framework of germanium atoms with unusual cages hosting the strontium cations. Quantum chemical analysis of the chemical bonding shows that the framework consists of three- A nd four-bonded germanium atoms yielding the precise electron count Sr[(4bGe0]4[(3b)Ge-]2 in accordance with the 8-N rule and the Zintl concept. Conflicting with that, a pseudo-gap in the electronic density of states appears clearly below the Fermi level, and elaborate bonding analysis reveals additional Sr-Ge interactions in the concave coordination polyhedron of the strontium atoms. © 2020 Ulrich Schwarz et al., published by De Gruyter, Berlin/Boston.

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Language(s): eng - English
 Dates: 2020-02-022020-02-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1515/znb-2019-0197
 Degree: -

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Title: Zeitschrift für Naturforschung, Teil B: Anorganische Chemie, Organische Chemie
  Abbreviation : Z. Naturforsch., B: Anorg. Chem., Org. Chem.
Source Genre: Journal
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Publ. Info: Tübingen : Verlag der Zeitschrift für Naturforschung
Pages: - Volume / Issue: 75 (1-2) Sequence Number: - Start / End Page: 209 - 216 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/ISSN 0340-5087