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Title
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Cationic clathrate of type-III (, ) : synthesis, crystal structure and thermoelectric properties
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Author
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Abstract
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| A first germanium-based cationic clathrate of type-III, Ge129.3P42.7Te21.53, was synthesized and structurally characterized (space group P42/mnm, a = 19.948(3) Å, c = 10.440(2) Å, Z = 1). In its crystal structure, germanium and phosphorus atoms form three types of polyhedral cages centered with Te atoms. The polyhedra share pentagonal and hexagonal faces to form a 3D framework. Despite the complexity of the crystal structure, the Ge129.3P42.7Te21.53 composition corresponds to the Zintl counting scheme with a good accuracy. Ge129.3P42.7Te21.53 demonstrates semiconducting/insulating behavior of electric resistivity, high positive Seebeck coefficient (500 μV K1 at 300 K), and low thermal conductivity (<0.92 W m1 K1) within the measured temperature range. |
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Language
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English
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Source (journal)
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Inorganic chemistry / American Chemical Society. - Easton, Pa
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Publication
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Easton, Pa
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2013
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ISSN
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0020-1669
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DOI
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10.1021/IC401203R
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Volume/pages
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52
:14
(2013)
, p. 8272-8279
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ISI
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000322087100052
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Full text (Publisher's DOI)
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