A Borosilicide with Clathrate VIII Structure.
J Am Chem Soc
; 144(30): 13456-13460, 2022 08 03.
Article
en En
| MEDLINE
| ID: mdl-35875975
ABSTRACT
The high-pressure phase Na8BxSi46-x (3 < x < 5) is the first representative of a borosilicide crystallizing in the rarely occurring clathrate VIII type structure. Crystals with composition Na8B4Si42 (space group I43Ì
m; a = 9.7187(2) Å; Pearson symbol cI54) were obtained at 5-8 GPa and 1200 K. The clathrate I modification exists for the same composition at lower pressure with a larger cell volume (Pm3Ì
n; a = 9. 977(2) Å; cP54). Profound structural adaptions allow for a higher density of the clathrate VIII type than clathrate I, opening up the perspective of obtaining clathrate VIII type compounds as high-pressure forms of clathrate I.
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01-internacional
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MEDLINE
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En
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J Am Chem Soc
Año:
2022
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Article
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Suecia