The activation energy for clustering of Ca2+-vacancy pairs in NaCl and a comparison with the diffusion activation energy
- 20 March 1981
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 14 (8) , 1133-1136
- https://doi.org/10.1088/0022-3719/14/8/009
Abstract
In alkali halides doped with bivalent cations the impurity-vacancy dipoles aggregate by a third-order reaction. Comparison of the activation energy of this reaction with the activation energy of the saturation diffusion coefficient gives the binding energy of a loosely bound dimer which is a precursor to the trimer. In a previously reported case (NaCl:Pb2+), where the guest ion is appreciably larger (20%) than the host, a binding energy of the dimer of 0.13 eV was found. In contrast, in the case reported here (NaCl:Ca2+), where the guest and the host are nearly equal in size, the binding energy of the dimer is not more than 0.02 eV.Keywords
This publication has 14 references indexed in Scilit:
- Dielectric relaxation and EPR studies of Gd3+-FI-dipoles in strontium and barium fluorideJournal of Physics C: Solid State Physics, 1979
- Energy parameters of cation motion in alkali halides as determined by dielectric relaxation measurementsJournal of Physics C: Solid State Physics, 1978
- The activation energy for clustering of Pb2+vacancy pairs in NaCl and a comparison with the diffusion activation energyJournal of Physics C: Solid State Physics, 1977
- Potassium bromide for infrared laser windows: Crystal growth, chemical polishing, and optical absorptionMaterials Research Bulletin, 1976
- Kinetics of aggregation of divalent cation impurities in alkali halides: Comments on a paper by Unger and PerlmanPhysical Review B, 1975
- The simultaneous diffusion of Pb2+ and Cd2+ in purified NaCl single crystalsJournal of Physics and Chemistry of Solids, 1971
- The intensity of the dielectric absorption in alkali halides containing divalent cationsJournal of Physics C: Solid State Physics, 1970
- Aggregation of divalent metal impurity in alkali halide crystalsJournal of Physics and Chemistry of Solids, 1970
- An Investigation of the Aggregation of Divalent Cationic Impurities in Alkali Halides by Dielectric AbsorptionProceedings of the Physical Society, 1962
- The Intensity of Dielectric Absorption in Alkali Halides as a Function of the Concentration of Divalent Cation ImpuritiesAustralian Journal of Physics, 1960