Quantum-chemical study of the structure and properties of hypothetical superhard materials based on the cubic silicon-carbon nitrides

R. N. Musin, D. G. Musaev, Ming-Chang Lin*

*此作品的通信作者

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

Density functional B3LYP/6-31G(d,p) calculations have been carried out to study the structural peculiarities and physical properties of the series of cubic (defect zinc-blende) silicon-carbon nitrides with composition SixC3-xN4 (x = 0, 1, 2, 3). As model systems, we have considered six clusters with the structure of the adamantane molecule (CH)4(CH2)6 (I), hexamethylenetetramine-like molecules N4(CH2)6-n(SiH2)n (II-V) (n = 0, 2, 4, 6), and silicon-substituted adamantane molecule (SiH)4(SiH2)6 (VI). These 10 heavy-atom clusters have been used to simulate the crystalline fragments of diamond (I), cubic (defect zinc-blende) silicon-carbon nitrides (II-V), and cubic (zinc-blende) silicon solid (VI). It was found that the full B3LYP/6-31G(d,p) geometry optimization of these clusters allow us to reproduce the structures, unit cell parameters, and bulk modulus (hardness) of real crystals (I and VI) quite well and to predict the structural and mechanical properties of the hypothetical crystalline compounds (II-V).

原文English
頁(從 - 到)797-803
頁數7
期刊Journal of Physical Chemistry B
103
發行號5
DOIs
出版狀態Published - 4 2月 1999

指紋

深入研究「Quantum-chemical study of the structure and properties of hypothetical superhard materials based on the cubic silicon-carbon nitrides」主題。共同形成了獨特的指紋。

引用此