International Conference on METALS IN SOLUTION
J. Phys. IV France 01 (1991) C5-147-C5-153
VARIATION OF F-CENTER CONCENTRATION IN DILUTE K-KCL SOLUTION : COMPARISON OF AN OPTICAL STUDY WITH THERMODYNAMIC PREDICTIONTh. RAUCH, D. NATTLAND and W. FREYLAND
Institute of Physical Chemistry, University Karlsruhe, Kaiserstrasse 12, D-7500 Karlsruhe, Germany
We have measured the concentration of liquid F-centers by optical absorption in KxKCl1-x solutions at 790 °C over a wide range of compositions up to a metal mole fraction x = 0.01. The composition has been accurately controlled by coulometric titration in situ. These results are compared with the predicitions of the F-center concentration as determined from metal activity measurements using a thermodynamic electron defect model. Good agreement is found between these separate data sets for a variation of composition by two orders of magnitude.
© EDP Sciences 1991