At the same time, it is found that the mean coordination number of atoms (i.e. the nearest neighbor number) in the system is rather sensitive to the variation of temperature and cooling rate, and their sudden transition points, as shown in Fig. 5, just corresponding to the crystallization transition temperatures Tc, this will give us a new way for researching the crystallization transition processes of liquid metals.
The relation of Debye temperature with the interaction potential of atoms, the relation of the mean coordination number with the shape and atomicity are deduced.
At the same time, it is found that the variation of the mean coordination number of atoms is closely related to that of 1551, 1441, 1661 bond_types, which reflects that the varying rule of the symmetric configurations in the system is related to the variation of the coordination number.
The short-range order parameters and atomic interaction energies are used in expressions for the pore concentration and mean coordination number within the first coordination sphere for liquid binary alloys.
In dilute solutions they are close to the mean coordination number of the water molecule in water.3.The following expression is proposed as a measure of the hydration of ions;
The increase in Tg with the P content in the glasses follows the Tanaka rule, that is, P addition has a networking effect due to the trivalent nature of the P atom and increases the mean coordination number.
The effect of various factors (such as pore-size distribution, a mean coordination number, the rate constant of disappearance of active sites, and the kinetics of blockage of separate necks) on the deactivation process is demonstrated and discussed.
In the prerent paper, an investigation of the structure of an amorphous inorganic ion exchanger-stannic selenopyrophosphate by means of determination of its radial distribution function (RDF) was reported. The structural parameters such as the interatomic distances and mean coordination number of the compound were obtained. The relation between the structural parameters and the selectivity of ion exchange of the stannic selenopyrophosphate has been also discussed.
Tortuosity,as a macro-parameter,modifies the behavior of complicated structure of porous media in terms of mass transfer in them.So far,the clear relationship between tortuosity and the microstructure of porous media is uncertain.Because of the complexity of the porous media,accurate measurement and quantitative description are difficult by both experiment and theory.Therefore,the combination of experiment and computer simulation is necessary for discovering the inner link between tortuosity and porous medi...
Diffusion of ternary gas mixture of ethylene, argon and carbon dioxide in γ -Al 2O 3 was analyzed based on the network approach with the effective medium theory and smooth field approximation, and was verified by the Wicke-Kallenbach steady state diffusion experiment. The diffusion flux equation,including pore size distribution and pore structure parameter—mean coordination number,was calculated to get the diffusion properties of each substance without prior knowledge of the tortuosit...