Crystal Field Splittings in Fe²⁺ Tutton Salts from Mössbauer Studies

抄録

The Mössbauer spectra of Fe²⁺ Tutton salts, which form an isomorphous series of hydrated double sulphates having the general formula Fe(MSO₄)₂·6H₂O, M=NH₄⁺, K⁺, Rb⁺ and Cs⁺ have been studied over a temperature range from 77°–300°K. The data is analysed to assign characteristic temperatures of the t_2g levels and find their splittings. It is concluded that the ground state wave function is singlet |xy> in all these cases. Furthermore the effect of varying electronegativity of M has negligible effect on isomer shift.