Reorientation and degrees of binding of X2+-vacancy complexes in KCl
- 7 August 1974
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 7 (15) , 2593-2602
- https://doi.org/10.1088/0022-3719/7/15/009
Abstract
The reorientation of impurity-vacancy complexes in KCl crystals doped with Mg2+, Ni2+, Mn2+, Ca2+, Sr2+, Pb2+and Ba2+was studied using the ITC method. These results are analysed together with those obtained by other authors by ITC, EPR and optical methods on Cd2+, Be2+, Eu2+, Sm2+and Yb2+ions. For the first series of ions and Cd2+, it was concluded that the most favoured vacancy position is the NNN site, and that it increasingly dominates the NN site as one proceeds from Mg2+to Ba2+. The observed reorientation of complexes is mainly governed by the vacancy jump from the NNN to the NN position. In the case of Be2+it was found that the majority of vacancies are in the NN position and the special behaviour of the Eu2+, Sm2+and Yb2+rare earth ions is discussed.Keywords
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