A new family of sp super(3)-hybridized carbon phases

A new family of superhard carbon allotropes C48(2i+ 1) is constructed by alternating even 4 and 8 membered rings. These new carbon allotropes are of a spatially antisymmetrical structure, compared with the symmetrical structures of bct-C4, Z-carbon, and P-carbon. Our calculations show that bulk modu...

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Bibliographic Details
Published in:Chinese physics B 2016-01, Vol.25 (1)
Main Authors: Xu, Ning, Li, Jian-Fu, Huang, Bo-Long, Wang, Bao-Lin
Format: Article
Language:English
Subjects:
Allotropes
Carbon
Diamond pyramid hardness
Diamonds
Graphite
Mathematical analysis
Phases
Vickers hardness
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Summary:A new family of superhard carbon allotropes C48(2i+ 1) is constructed by alternating even 4 and 8 membered rings. These new carbon allotropes are of a spatially antisymmetrical structure, compared with the symmetrical structures of bct-C4, Z-carbon, and P-carbon. Our calculations show that bulk moduli of C48(2i+ 1) are larger than that of c-BN and smaller than that of cubic-diamond. C48(2i+ 1) are transparent superhard materials possessing large Vicker hardness comparable to diamond. This work can help us understand the structural phase transformations of cold-compression graphite and carbon nanotubes.
ISSN:1674-1056
1741-4199
DOI:10.1088/1674-1056/25/1/016103