THE ELECTRIC FIELD GRADIENT TENSOR IN FERROUS COMPOUNDS,
Abstract
The electric field gradient tensor at the iron nucleus in ferrous (Fe2+) compounds is investigated. Under the combined action of axial and rhombic crystalline fields and the spin-orbit interaction, the ferrous ion (5D, 3d6) epsilon states produce a large, temperature dependent, contribution to the electric field gradient tensor. It is found that this direct contribution is diminished by that from the lattice itself (the second order axial and rhombic components of the crystalline field), as well as Sternheimer polarization effects and covalency. The results of this investigation are then applied to Mossbauer results in FeSiF6.6H2O to obtain an estimate of the electric quadrupole moment of Fe57m (0.2910.2b), which is in agreement with that from ferric (Fe3+) studies. Finally, estimates also based upon Mossbauer measurements, are made of the epsilon energy splittings in the ferrous compounds, FeSiF6.6H2O, FeSO4.7H2O, FeC2O4.2H2O, Fe(NH4SO4)1.6H2O, FeSo4, FeC1w.4H2O and FeF2. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 22, 1963
- Accession Number
- AD0425685
Entities
People
- R. Ingalls
Organizations
- Carnegie Institute of Technology