It and possible to write rc x cscl 261 r clnot thes

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Unformatted text preview: cause of theelectrons that are contained core electrons Those nature of the coulombic attractive force, we expect each Cs cation to be surrounded by as many negatively charged Cl anions within the filled inner shells of system is minimized when the as is geometrically possible. The total energy for the an atom. number of oppositely charged nearest neighbors for each ion is maximized. The geometric coring Variation in the solute distribution of a single factor responsible for determining the CN of ions is the ratio of the radii of the ions. phase due to nonequilibrium equilibrium separation distance for Using the procedure outlined in Section 2.4.1, the solidification. Coring occurs CsCl, x0 (CsCl), can be foundcomposition of the solid is thenthe liquid are because the from the bond-energy curve. It and possible to write rC x CsCl (2.6–1) r Clnot thes same0 at a specific temperature. where the terms on the left are the radii ofA degradation mechanismwritten for the ions. Similar equations may be in which corrosion fatigue a variety of compounds, and the resulting set of simultaneous equations may be solved for corrosion and mechanical fatigue occur simultaneously the respective radii. Using this procedure, a self-consistent set of ionic radii can be and their synergistic rigid sphere model for more serious than calculated. The result justifies the use of aeffects are much describing ionic solids. The atomic and ionic radiipredicted from given inseparate C. would be of the elements are their Appendix effects. Let r represent the radius of the smaller ion, usually the cation, and let R represent the Name given between the ratio of the force radius of the coulombic forceanion. The relationshipto the electrostaticradii larger ion, usually the and the resulting CN can be determined using the following constraints: (1) cations of that develops between charged species. The magnitude “touch” anions, (2) the number of anions surrounding a given cation will be as high as the force is proportional overlap. geometrically...
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