Investigation of true Ni2+-halogen distances in alkali halide lattices

Using the mukalpha model of Ni2+-6X- clusters the true distances between impurity Ni2+ cation and halogen anion in alkali halide lattices are estimated from the optical spectral data. The results suggest that the true impurity cation-ligand anion distances are close to the sum of ionic radii of the impurity cation and ligand anion but not the cation-anion distance of the perfect lattices in the case that the ionic radius of host cation is larger than that of impurity cation.

[1]  Zhao Min-guang,et al.  The local structure of Cr3+ centre in A2MF4 (A K, Rb, Cs; M Zn, Cd, Mg) crystals , 1990 .

[2]  Zhao Min-guang,et al.  A mu-kappa-alpha correlation ligand-field model for the Ni2+-6X- cluster , 1987 .

[3]  Zhao Min-guang,et al.  Theoretical study of phase transformation in ferrous fluosilicate using EPR and optical spectra , 1987 .

[4]  M. Du,et al.  An EPR Study of the Structure of the Cr3+-Vacancy Centre in MgO , 1987 .

[5]  Zhao Min-guang,et al.  Determination of the state equation of NiX2 from the high-pressure spectra shifts , 1987 .

[6]  Yu Wan-Lun,et al.  The effect of uniaxial stress on the zero-field splitting of Mn2+ ions in MgO, CaO, MnO and SrO crystals , 1987 .

[7]  Yu Wan-Lun,et al.  Determination of the temperature variation of the crystal structure of CdCl2 from the EPR data for Mn2 , 1986 .

[8]  Yu Wan-Lun,et al.  Determination of the MnF2 and ZnF2 crystal structure from the EPR and optical measurements of Mn2 , 1985 .

[9]  C. Catlow,et al.  Direct observations of the dopant environment in fluorites using EXAFS , 1984, Nature.

[10]  Zhao Min-guang,et al.  Two-center transitions in the antiferromagnetic salt FeC O 3 , 1983 .

[11]  Zhao Min-guang,et al.  Erratum: d-orbital theory and high-pressure effects upon the EPR spectrum of ruby , 1983 .

[12]  M. T. Barriuso,et al.  Ligand relaxation in copper- and silver-atom-doped alkali halides , 1982 .

[13]  S. Radhakrishna,et al.  Optical and Magnetic Resonance Studies of Transition Metal Ions and Complexes in Alkali Halides , 1981 .

[14]  J. Spaeth,et al.  ENDOR Study of Cubic Fe3+ Centres in KMgF3 , 1981 .

[15]  T. Yosida.  The endor Investigations of LiBaF3: Mn2+ Having the Inverse Perovskite Structure , 1980 .

[16]  G. Lehmann.  Variation of hyperfine splitting constants for 3d5-ions with interatomic distance , 1980 .

[17]  J. Rousseau,et al.  Examen des paramètres de l'Hamiltonien de spin de Mn2+ substitué a M, dans les fluoperovskites AMF3, dans la phase tétragonale de RbCaF3 et dans les composés A2MF4 , 1978 .

[18]  W. T. Williams,et al.  Optical spectra of the divalent nickel ion in cubic lattices , 1972 .

[19]  S. Sugano,et al.  Multiplets of transition-metal ions in crystals , 1970 .

[20]  P. Baranov,et al.  Theoretical Study of Properties of Copper and Silver Atoms Stabilized in Alkali Halide Crystals , 1968, December 1.

[21]  J. Thornley,et al.  Covalent bonding and magnetic properties of transition metal ions , 1966 .

[22]  J. Griffith,et al.  The Theory of Transition-Metal Ions , 1962 .

[23]  R. E. Trees.  Configuration Interaction in Mn II , 1951 .