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Atomic and ionic refractivities

Atomic and ionic refractivities The contribution that each atom or ion makes to the total refractive index. [Pg.176]

The measure of polarizability was provided by the abundant data on molecular, ionic and atomic refractions. Refractions in chemistry seem to be of historical importance today. Their long use and the sophisticated level they reached in chemistry provide important hints. Refraction has been recognized as a molecular volume, thus discussion of softness may be reduced to the level of molecular or atomic dimensions, as indeed it was later proposed (Sect. 1.2). Refractions have also been known to be additive, atomic refractions are transferable between molecules. This was but the first indication that atomic softness that should roughly parallel refractions (polarizability), may also be defined for bonded atoms. Examples of atomic and ionic refractions are given in Tables 1 and 2. The increasing order of refraction indeed reflects the expected hardness sequence, the borderline between soft and hard species can be drawn at ca. 2-3 cm /mol. [Pg.47]


See other pages where Atomic and ionic refractivities is mentioned: [Pg.495]    [Pg.502]   
See also in sourсe #XX -- [ Pg.176 ]




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