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Absorption and ionic conductivity of oxygen‐containing SrF 2 crystals
Author(s) -
Bollmann W.
Publication year - 1980
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19800150319
Subject(s) - ion , oxygen , absorption (acoustics) , analytical chemistry (journal) , ionic bonding , absorption band , crystallography , chemistry , oscillator strength , materials science , physics , optics , organic chemistry , chromatography , astronomy , composite material , spectral line
Abstract An absorption band at 3644 cm −1 is caused by isolated OH − ions. O − ions cause an absorption band at 213 nm the oscillator strength of which is 0.020. Charge‐compensation of O − ions is effected by F − ion vacancies (F ν − ). As for CaF 2 crystals there occur monomers and dimers of [O − – F ν − ] complexes. The mass action constants of association of F ν −with oxygen centres are K AD = ⅓ exp (4.28 – 0.82 eV/ kT ) for [O − – F ν − ], K AT = 4 exp (17.4 – 1.25 eV/ kT ) for [2 O − – F ν − ] and K AQ = exp (4.2 – 0.89 eV/ kT ) for [2 O − – 2 F ν − ].