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Thermal Reorientation Kinetics of I 2 − in RbI
Author(s) -
Delbecq C. J.,
Stokes J. P.,
Yuster P. H.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220800208
Subject(s) - anisotropy , activation energy , jump , kinetics , orientation (vector space) , atmospheric temperature range , materials science , range (aeronautics) , thermal , ion , crystallography , molecule , condensed matter physics , chemical physics , chemistry , thermodynamics , optics , physics , geometry , composite material , mathematics , classical mechanics , organic chemistry , quantum mechanics
Experimental studies of the thermally activated reorientation of I 2 −in RbI: AgI single crystals are carried out by measuring the decay of the optical anisotropy of preferentially oriented I 2 −at fixed temperatures. These studies show that in the temperature range investigated, contrary to previous results by others, thermally induced changes in orientation of I 2 −in RbI result almost totally from elementary jumps in which the orientation of the I 2 −molecule ion changes by 60°. The activation energy for this 60° jump is determined to be (0.306 ± 0.005) eV.