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Covalency as Source of Intensity for d‐d Transitions in Octahedral Complexes
Author(s) -
Malakhovskii A. V.,
Vasilev G. G.
Publication year - 1983
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.2221180139
Subject(s) - octahedron , intensity (physics) , crystallography , chemistry , ligand field theory , crystal (programming language) , transition metal , hexagonal crystal system , spin (aerodynamics) , condensed matter physics , metal , crystal structure , physics , optics , thermodynamics , ion , programming language , catalysis , biochemistry , organic chemistry , computer science
A pair‐vibrational mechanism is suggested for inducing of spin‐forbidden d‐d transitions in centrosymmetric complexes. Only the vibrational part of this mechanism appeared to be sufficient to account for the observed strong difference in intensity of the corresponding d‐d transitions (spinforbidden included) in different crystals with analogous magnetic properties. This phenomenon is proved to be due to the difference in the degree of covalency of the metal‐ligand bonds and not to the difference in the value of crystal fields in the compounds. Experimental results obtained on the crystals RbMnF 3 , CsMnF 3 , and RbMnCl 3 , (in hexagonal and cubic modifications) are in agreement with the drawn deductions.