STRUCTURE OF VITREOUS-SILICA - VALIDITY OF RANDOM NETWORK THEORY
STRUCTURE OF VITREOUS-SILICA - VALIDITY OF RANDOM NETWORK THEORY
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DOI：
10.1080/14786437208223861
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发表时间：
1972-01-01
影响因子：
1.6
通讯作者：
DEAN, P
中科院分区：
文献类型：
--
作者：
BELL, RJ;DEAN, P
结果表明，玻璃结构的随机网络理论令人满意地解释了观察到的玻璃二氧化硅的 X 射线和中子径向分布函数，原子间距离至少为 0·8 nm (8 Å)。该结果基于对包含与随机网络理论的一般规则一致的样本原子排列的分子模型的研究。对一系列分子模型的分析（简要讨论）表明，键角的分布可能不是决定理论和实验径向分布函数之间总体一致性的唯一因素。在这种情况下，网络中分子环的分布似乎很重要。令人满意的模型的详细信息在附录中以原子坐标和最近邻连接列表的形式给出。
It is shown that the random network theory of glass structure accounts satisfactorily for the observed x-ray and neutron radial distribution functions of vitreous silica, out to interatomic distances of at least 0·8 nm (8 Å). This result is based on the study of a molecular model containing sample atomic arrangements consistent with the general precepts of the random network theory. Analysis of a range of molecular models, discussed briefly, suggests that the distribution of bond angles may not be the only factor determining the overall agreement between theoretical and experimental radial distribution functions. The distribution of molecular loops in the network seems to be of importance in this context. Details of the satisfactory model are given in the Appendix, in the form of a list of atomic coordinates and nearest neighbour connections.