Cs(8-x)Si(46): a type-I clathrate with expanded silicon framework.
The synthesis of the new binary Cs(8-x)Si(46) (shown here) completes the series of binary alkali metal silicides with a clathrate-I structure M(8-x)Si(46) (M = Na, K, Rb, Cs). In contrast with the lighter homologues, Cs(8-x)Si(46) can be prepared only at elevated pressures. The compound was obtained at 1200 degrees C between 2-10 GPa and the Cs content rises with applied pressure.
Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany.
Aron
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Wosylus
Igor
I
Veremchuk
Walter
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Schnelle
Michael
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Baitinger
Ulrich
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Schwarz
Yuri
Y
Grin