Optical absorption of complex ions in alkali halide solutions

1976 ◽  
Vol 19 (12) ◽  
pp. 1637-1639
Author(s):  
Ya. N. Pershits ◽  
T. A. Kalennikova
Keyword(s):  
Optical Absorption ◽  
Alkali Halide ◽  
Complex Ions

Method of Gaussian quadrature in the calculation of optical absorption and magnetic circular dichroism spectra of s2 ions in alkali halide crystals: application to KBr:In+

1979 ◽  
Vol 57 (10) ◽  
pp. 1614-1623 ◽  
Author(s):  
Y. Kamishina ◽  
V. S. Sivasankar ◽  
P. W. M. Jacobs
Keyword(s):  
Circular Dichroism ◽  
Optical Absorption ◽  
Alkali Halide ◽  
Magnetic Circular Dichroism ◽  
Gaussian Quadrature ◽  
Electron Configuration ◽  
Alkali Halide Crystals ◽  
Complete Energy Matrix ◽  
Circular Dichroïsm ◽  
Good Agreement

The problem of calculating the lineshape function for optical absorption and magnetic circular dichroism due to ionic impurities with the ns2 outer electron configuration, incorporated substitutionally in alkali halide crystals, has been reformulated. The complete energy matrix has been diagonalized directly. Integration over the interaction mode coordinates of Eg and T2g symmetry has been carried out numerically using Gaussian quadrature formulae; the interaction with the A1g mode has been taken into account by the usual convolution procedure. The method has been applied to KBr:In+. The calculated lineshape functions for optical absorption at temperatures ranging from 4 to 300 K and, for MCD at 5 K, are in good agreement with the experimentally determined lineshapes. Moreover, the theory accounts very well for the observed variation of the effective g tensor for the A band with temperature. The calculated values for the moments of the absorption and MCD lineshape functions are in reasonably satisfactory agreement with those deduced from the observed spectra.

Oscillator strength for optical absorption by silver ions in alkali halide crystals

1963 ◽  
Vol 24 (2) ◽  
pp. 239-245 ◽  
Author(s):  
J.M. Conway ◽  
D.A. Greenwood ◽  
J.A. Krumhansl ◽  
W. Martienssen
Keyword(s):  
Optical Absorption ◽  
Oscillator Strength ◽  
Alkali Halide ◽  
Silver Ions ◽  
Alkali Halide Crystals

scholarly journals Coulomb Complexing and the Solubilization of Oxides in Halide Melts

1983 ◽  
Vol 38 (2) ◽  
pp. 116-119 ◽  
Author(s):  
M. Blander ◽  
Z. Nagy
Keyword(s):  
New Media ◽  
Alkali Halide ◽  
Complex Ions ◽  
Electrochemical Processes ◽  
Polyvalent Cations

Abstract Coulomb attractions between polyvalent cations and anions in alkali halide melts lead to the formation of complex ions and to the solubilization of oxides of some cations by their halides. We have observed such solubilizations of Al2O3 in LiCl-KCl eutectic melts. In addition, we predict and observe the dissolution of a number of other oxides by AlCl3 in LiCl-KCl melts. We also predict that solubilization will be better in other halide solvents. Our results suggest possible new media for pyrometallurgy and chemical and electrochemical processes.

Optical Absorption Spectra of KBr:Pb2+ Crystals

1973 ◽  
Vol 51 (21) ◽  
pp. 2242-2248 ◽  
Author(s):  
Robert E. Chaney ◽  
P. W. M. Jacobs ◽  
Taiju Tsuboi
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Alkali Halide ◽  
Room Temperature ◽  
Nonlinear Least Squares ◽  
Energy Separation ◽  
Optical Absorption Spectra ◽  
Absorption Bands ◽  
Fundamental Properties ◽  
Alkali Halide Crystals

The fundamental properties of the absorption spectra of KBr:Pb2+ crystals have been studied at various temperatures from the liquid helium range to room temperature. The observed absorption bands are assigned to the so-called A, B, C, and D' bands by analogy with the absorption bands of other s2-configuration ions in alkali halide crystals. The B, C, and D′ bands overlap but have been resolved into their components by nonlinear least squares analysis. A discussion is given of the energy separation between the B and C bands in Sn2+-, Tl+-, and Pb2+-doped alkali halide crystals.

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