Two kinds of planimetric diagrams, which consist of the boat form F6 and F5, the storm petrel form F6and F5, respectively, were proposed to express the geometric structure of fullerene cage in this study. There are tw...Two kinds of planimetric diagrams, which consist of the boat form F6 and F5, the storm petrel form F6and F5, respectively, were proposed to express the geometric structure of fullerene cage in this study. There are two chief advantages using the diagrams: ( i) the spatial symmetrical characteristic of fullerene cage is not destroyed; (ii) the coordination forms of F5 and F6 in the structure can be clearly expressed. This work has laid the foundation for studying the structural geometry of fullerene cage and its quantum chemistry and property.展开更多
By analyzing the relationship between thermal expansion coefficients of AB type halides and their crystal chemistry properties, an empirical formula for theoretical calculation of their thermal expansion coefficients ...By analyzing the relationship between thermal expansion coefficients of AB type halides and their crystal chemistry properties, an empirical formula for theoretical calculation of their thermal expansion coefficients is drawn. The formula has a simple form and a high accuracy with an average error of 2 4%.展开更多
文摘Two kinds of planimetric diagrams, which consist of the boat form F6 and F5, the storm petrel form F6and F5, respectively, were proposed to express the geometric structure of fullerene cage in this study. There are two chief advantages using the diagrams: ( i) the spatial symmetrical characteristic of fullerene cage is not destroyed; (ii) the coordination forms of F5 and F6 in the structure can be clearly expressed. This work has laid the foundation for studying the structural geometry of fullerene cage and its quantum chemistry and property.
文摘By analyzing the relationship between thermal expansion coefficients of AB type halides and their crystal chemistry properties, an empirical formula for theoretical calculation of their thermal expansion coefficients is drawn. The formula has a simple form and a high accuracy with an average error of 2 4%.
