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Materials 2016, 9(4), 236;

Synthesis and Structural Characterization of the New Clathrates K8Cd4Ge42, Rb8Cd4Ge42, and Cs8Cd4Ge42

Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
Author to whom correspondence should be addressed.
Academic Editors: Matt Beekman and Yuri Grin
Received: 3 March 2016 / Revised: 17 March 2016 / Accepted: 21 March 2016 / Published: 25 March 2016
(This article belongs to the Special Issue Inorganic Clathrate Materials)
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This paper presents results from our exploratory work in the systems K-Cd-Ge, Rb-Cd-Ge, and Cs-Cd-Ge, which yielded the novel type-I clathrates with refined compositions K8Cd3.77(7)Ge42.23, Rb8Cd3.65(7)Ge42.35, and Cs7.80(1)Cd3.65(6)Ge42.35. The three compounds represent rare examples of clathrates of germanium with the alkali metals, where a d10 element substitutes a group 14 element. The three structures, established by single-crystal X-ray diffraction, indicate that the framework-building Ge atoms are randomly substituted by Cd atoms on only one of the three possible crystallographic sites. This and several other details of the crystal chemistry are elaborated. View Full-Text
Keywords: clathrates; type-I structure; germanium; cadmium; Zintl phases clathrates; type-I structure; germanium; cadmium; Zintl phases

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Schäfer, M.C.; Bobev, S. Synthesis and Structural Characterization of the New Clathrates K8Cd4Ge42, Rb8Cd4Ge42, and Cs8Cd4Ge42. Materials 2016, 9, 236.

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