Mekhanobr Engineering JSC (Russia):

Zuyev V. V., Doctor of Geology and Mineralogy; Leading Researcher; science@mekhanobr.spb.ru

A methodology for cations ionic radiuses (atom kernels) estimation has been developed in the context of atom kernels and binding electrons crystal chemistry, using atom kernels energy coefficients; necessary formulas are presented, by means of which a large amount of corresponding estimates was performed, demonstrating reasonable convergence with the known experimental information. Thus, an alternative approach is proposed for determination of cations ionic radiuses, solving an important problem in crystal chemistry. An attempt to estimate anions ionic radiuses by means of the proposed formulas in general did not yield successful results. The analysis of the obtained data permits to draw a conclusion, that ionic crystal lattice concept is justified from physical standpoint with respect to a limited scope of crystalline halogenides, that is, compounds of alkali and alkaline-earth metals, as well as other metals, with anions F^1–, Cl^1–, Br^1–, I^1–. Physically, existence of ionic crystals with double- and higher-charged anions is significantly problematical. This conclusion provides additional arguments in favor of the earlier expressed judgments on inadequacy and boundedness of the ionic crystal lattice concept.

1. Zuyev V. Ostovno-elektronnaya kristallokhimiya i svoystva mineralov (s ispolzovaniyem additivnoy geoenergeticheskoy kontseptsii Fersmana) (Atom kernels and binding electrons crystal chemistry and properties of minerals (with use of Fersman's additive geopower conception)). Germany, Lambert Academic Publishing, 2012, 324 p.
2. Huheey J. Neorganicheskaya khimiya (Inorganic chemistry). Moscow, Khimiya, 1987, 696 p.
3. Urusov V. S. Teoreticheskaya kristallokhimiya (Theoretical crystal chemistry). Moscow, MGU (Moscow State University), 1987, 275 p.
4. Pauling L. The nature of the chemical bond. 3^rd edition. Ithaca—New York, Cornell University Press, 1960, 644 p.
5. Batsanov S. S. Eksperimentalnyye osnovy strukturnoy khimii (Experimental basis of structural chemistry). Moscow, Izdatelstvo standartov, 1986, 240 p.