| | 1 | Author
| Fernando Rull | Requires cookie* | | | Title
| R a m a n  | | | | Abstract
| S p e c tro s c o p ic S tu d y o f th e Io n A s s o c ia tio n o f L ith iu m S u lf a te A q u e o u s S o lu tio n s Dedicated to Prof. Hitoshi Ohtaki on the occasion of his 60th birthday A Raman spectroscopic study of Li2S04 aqueous solutions as function of concentration and temperature was performed. The dynamic properties of the sulfate ions were studied by a band profile analysis of their internal modes using Fourier transform methods. This analysis reveals the perturbation of the S04" vibrations due to ionic interactions. From the vt (SO;2) band profile the spectroscopic ionic association constant was calculated in the range from 5 to 80 °C. The large difference found between the values thus obtained for the association constant and the values obtained from macroscopic measurements is interpreted, assuming that Raman spectra reflect only the short-range forces acting on the ions. Using the Bjerrum equation to calculate the contribution for the long-range forces, good agreement is found between the spectroscopic and macroscopic results. | | | |
Reference
| Z. Naturforsch. 50a, 292—300 (1995); received November 29 1994 | | | |
Published
| 1995 | | | |
Keywords
| Raman spectra, Lithium sulfate, Aqueous solutions, Ionic association, Band profile | | | |
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