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Low‐temperature precipitation in NaCl: Eu ++ monocrystals
Author(s) -
Suszyńska M.,
Gubański A.,
Opyrchal H.
Publication year - 1987
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170221003
Subject(s) - impurity , precipitation , ion , kinetics , diffusion , thermal decomposition , phase (matter) , decomposition , solid solution , chemistry , analytical chemistry (journal) , materials science , crystallography , thermodynamics , physics , organic chemistry , chromatography , quantum mechanics , meteorology
It has been shown that the macroscopic features of the as grown NaCl crystals containing up to about 140 m ppm of Eu ++ ions agree well with the main characteristics of the Na 2 EuCl 4 phase present in these crystals. Thermal decomposition of the NaCl:Eu ++ solid solution leads to the formation of the mentioned Na 2 EuCl 4 phase at temperatures not very much higher than 273 K. The kinetics of this process is governed by the pipe diffusion which leads to the growth of the small impurity aggregates already present in quenched samples.