Abstract
The main purpose of this paper is to show the importance of the reconstruction energies on the actinide properties both in solid state and solutions. As a consequence of the specific dualism localization-delocalization of the 5f and 6d electrons, charge waves can occur in crystal compounds at low temperature. In an extended two-band Hubbard model which takes into account the intra- and inter-site Coulomb interactions as well as the kinetic energy, the criteria for the occurrence of the charge and orbital waves are obtained. Orbital ordering can be accompanied by spin density wave formation. Partial attention is given to the occurrence of supraconductivity, it is proposed that electron pair formation in a mixed valence state is one of the important mechanisms of supraconductivity state formation. The influence of the excitation energy on the stability and geometry is analysed. Estimates of the Cm(IV-V), Cm(V-VI) and Cm(VI-VII) oxidation potentials are given. It is shown that distortion from the linear to the bent structure is possible for AnO+2 cations.
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