Determination of the Ni+-F- distance for square-planar and linear centers in LiF:Ni+ and NaF:Ni+ |
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| Authors: | MT Barriuso M Moreno |
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| Institution: | Departamento de Física Teórica, Facultad de Ciencias, Universidad de Santander, Santander, Spain;Departamento de Optica y Estructura de la Materia, Facultad de Ciencias, Universidad de Santander, Santander, Spain |
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| Abstract: | The distance R between Ni+ and the closest F- anions for several square- planar and linear Ni+ centers observed in LiF and NaF has been derived from the isotropic superhyperfine constant As. R is smaller for linear than for square-planar centers according to Pauling's criteria. The knowledge of R for every square-planar center allows one to explain reasonably variations undergone by the experimental g∥?g0 values. Finally the present data reveal that the ionic radius of the unusual Ni+ ion is indeed quite close to that of Cu+. |
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