Volume dependence of the dielectric constants and the effective charge parameter in alkali halides under hydrostatic pressure

1977 ◽  
Vol 24 (10) ◽  
pp. 739-742 ◽  
Author(s):  
V.P. Gupta ◽  
H.P. Sharma ◽  
Jai Shanker
Keyword(s):  
Hydrostatic Pressure ◽  
Effective Charge ◽  
Alkali Halides ◽  
Dielectric Constants ◽  
Volume Dependence ◽  
Charge Parameter

Refractive indices, electronic polarizabilities and dielectric constants of alkali halides

1992 ◽  
Vol 33 (5) ◽  
pp. 389-393 ◽  
Author(s):  
R.R. Reddy ◽  
S. Anjaneyulu ◽  
T.V.R. Rao
Keyword(s):  
Alkali Halides ◽  
Dielectric Constants ◽  
Refractive Indices

Volume dependence of the electronic dielectric constant of crystals under hydrostatic pressure

1978 ◽  
Vol 18 (12) ◽  
pp. 7186-7188 ◽  
Author(s):  
Jai Shanker ◽  
A. K. G. Lashkari ◽  
O. P. Sharma
Keyword(s):  
Dielectric Constant ◽  
Hydrostatic Pressure ◽  
Volume Dependence

Electronic polarizability of ions in the alkali-halide crystals

1988 ◽  
Vol 66 (5) ◽  
pp. 385-389 ◽  
Author(s):  
S. K. Sharma ◽  
R. M. Misra ◽  
M. N. Sharma ◽  
M. P. Madan
Keyword(s):  
Theoretical Estimate ◽  
Alkali Halides ◽  
Dielectric Constants ◽  
Electronic Polarizability ◽  
Ionic Radii ◽  
Crystalline Environment ◽  
The Family ◽  
Alkali Halide Crystals ◽  
Experimental Data Analysis ◽  
Good Agreement

A theoretical estimate of the high-frequency dielectric constants is made using the molar polarizabilities for a number of alkali halides. These are shown to be in good agreement with the new and more reliable experimental data. Analysis by means of the additivity rule within the family of salts is used to compute the total free ion polarizability of ionic constituents and the change in polarizability when the ions are placed in a crystalline environment. Furthermore, the anion electronic polarizability in ionic crystals has been determined. It is found to vary from crystal to crystal, as opposed to the generally accepted assumption that each ion has the same polarizability in all compounds. The dependence of polarizability upon ionic radii has been discussed. The results from this simple analysis compare well with other determinations.

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