Absorption Lines of Manganous Fluosilicate Haxahydrate

概要

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The Zeeman effect and the dilution effect of absorption lines in the violet region of MnSiF_6・6H_2O were measured at low temperatures between 20°K and 1.2°K with a spectrograph with 2.6A/mm dispersion in order to complete the analysis of the spectra. The properties of the excited state for sharp quartet lines between 24, 918 cm^<-1> and 24, 953 cm^<-1> became clear in some detail. The singlet line at 25, 043 cm^<-1> which was isotropic in the absence of a field became anisotropic when a magnetic field was applied. These anisotropies may be explained assuming magnetic dipole transitions. As a result, it is concluded that the quartet lines and the singlet line correspond to transitions from the ground state ^6A_1 to the excited states ^4E and ^4A_1, respectively. Assuming the frequencies of the three odd ligand vibrations, the other broad lines in the shorter wave length region can well be interpreted as the transition coupled with these vibrations. An observation of the shifts of the quartet lines and the singlet line due to dilution is useful for the assignment of these lines.