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Cage Adaption by High-Pressure Synthesis: The Clathrate-I Borosilicide Rb8B8Si38.


ABSTRACT: Rb8B8Si38 forms under high-pressure, high-temperature conditions at p = 8 GPa and T = 1273 K. The new compound (space group Pm3?n, a = 9.9583(1) Å) is the second example for a clathrate-I borosilicide. The phase is inert against strong acids and bases and thermally stable up to 1300 K at ambient pressure. (Rb+)8(B-)8(Si0)38 is electronically balanced, diamagnetic, and shows semiconducting behavior with moderate Seebeck coefficient below 300 K. Chemical bonding analysis by the electron localizability approach confirms the description of Rb8B8Si38 as Zintl phase.

SUBMITTER: Hubner JM 

PROVIDER: S-EPMC7887739 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Cage Adaption by High-Pressure Synthesis: The Clathrate-I Borosilicide Rb<sub>8</sub>B<sub>8</sub>Si<sub>38</sub>.

Hübner Julia-Maria JM   Jung Walter W   Schmidt Marcus M   Bobnar Matej M   Koželj Primož P   Böhme Bodo B   Baitinger Michael M   Etter Martin M   Grin Yuri Y   Schwarz Ulrich U  

Inorganic chemistry 20201026 4


Rb<sub>8</sub>B<sub>8</sub>Si<sub>38</sub> forms under high-pressure, high-temperature conditions at <i>p</i> = 8 GPa and <i>T</i> = 1273 K. The new compound (space group <i>Pm</i>3̅<i>n</i>, <i>a</i> = 9.9583(1) Å) is the second example for a clathrate-I borosilicide. The phase is inert against strong acids and bases and thermally stable up to 1300 K at ambient pressure. (Rb<sup>+</sup>)<sub>8</sub>(B<sup>-</sup>)<sub>8</sub>(Si<sup>0</sup>)<sub>38</sub> is electronically balanced, diamagnetic,  ...[more]

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