Publication Date:
2011-07-21
Description:
The clathrate-I phase Cs 8– x Ge 44+ y □ 2– y (space group Pm n ) was prepared by high-pressure high-temperature reactions of Cs 4 Ge 4 and α-Ge. Different reaction conditions were found to have a strong influence on the lattice parameter of the clathrate-I phase ranging from 10.8070(2) Å to 10.8493(3) Å. A single crystal with composition Cs 8 Ge 44.40(2) □ 1.60(2) was obtained from a sample with a = 10.8238(2) Å (niobium ampoule, p = 3.4 GPa, T max = 1400 °C). Structure analysis based on X-ray single crystal data shows unambiguously an excess of germanium atoms with respect to the electron balanced composition Cs 8 Ge 44 □ 2 on basis of the Zintl concept.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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