Numéro
J. Phys. IV France
Volume 01, Numéro C5, Décembre 1991
COLLOQUE WEYL VII
International Conference on METALS IN SOLUTION
Page(s) C5-155 - C5-160
DOI http://dx.doi.org/10.1051/jp4:1991519
COLLOQUE WEYL VII
International Conference on METALS IN SOLUTION

J. Phys. IV France 01 (1991) C5-155-C5-160

DOI: 10.1051/jp4:1991519

DIPOLAR ATOMS IN Na-NaX SOLUTIONS ? -AN OPTICAL STUDY-

Th. SCHINDELBECK, D. NATTLAND and W. FREYLAND

Institute of Physical Chemistry, University Karlsruhe, Kaiserstrasse 12, D-7500 Karlsruhe, Germany


Abstract
In a recent quantum molecular dynamics calculation of diluted Na-NaBr solutions Parrinello and coworkers found that excess electrons may localize to form dipolar Na atomic - like states. This is at variance with spectroscopic observations that F-center like states prevail in alkalimetal-alkalihalide solutions. In order to get further insight into this problem we have reinvestigated the optical absorption spectra of dilute alkalimetal-alkalihalide-NaCl solutions as a function of temperature and for various salt compositions. The main result of this study is that indeed in NaCl-rich solutions deviations from the expected F-center characteristics are visible.



© EDP Sciences 1991