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F‐Centres in Alkaline Earth Fluorides
Author(s) -
Feltham P.
Publication year - 1967
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.19670200230
Subject(s) - alkaline earth metal , fluorine , lattice (music) , ion , lattice energy , atomic physics , electron , isomorphism (crystallography) , chemistry , crystallography , inorganic chemistry , crystal structure , physics , alkali metal , quantum mechanics , organic chemistry , acoustics
The ls‐2p transition energy of electrons trapped at fluorine ion vacancies in BaF 2 is calculated by means of a continuum approximation, allowing for polarisation. The lattice potential is determined from that previously [8] derived in the evaluation of the F‐centre absorption frequency in CaF 2 , taking into account lattice isomorphism and differences in the core structures of the respective cations. The calculated value of the energy agrees well with that obtained in additively coloured BaF 2 crystals [1] by ESR.