- 著者
-
佐藤 満雄
- 出版者
- 一般社団法人 日本鉱物科学会
- 雑誌
- 岩石鉱物科学 (ISSN:1345630X)
- 巻号頁・発行日
- vol.30, no.6, pp.288-299, 2001 (Released:2008-08-30)
- 参考文献数
- 21
- 被引用文献数
-
1
1
Framework structures of tectosilicates including zeolite, silica and feldspar minerals are reviewed on the basis of concentric cluster (CCL). The structural characteristics of them can be simply represented by the points (Si or Al atoms) and the lines connecting between the points. Starting from a given point, an nth CCL can be graphically defined as a set of all the points ranging from topological distance 0 to n, and all the lines responsible for the connection between them. The topological distance used here means the shortest step numbers responsible for the connection between two points, not the geometrical distance. As any kind of tectosilicate frameworks can be completely covered with the CCL by extending its topological distance from 0 to n, the topological characteristics of them are realized on a series of these CCLs. In order to quantify these CCLs, the front nodes are newly defined, and a concept of the coordination degree sequence (CDS) is introduced. In the CDS, the front nodes are characterized in terms of their topological valence numbers. The CDS can be effectively applied to the topological characterization, the classification, and the systematic computer modeling of tectoslicate frameworks. Some of application examples are shown.