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24 de jun. de 2024 · Rare-earth element - Electronic Structure, Ionic Radius: The chemical, metallurgical, and physical behaviours of the rare earths are governed by the electron configuration of these elements. In general, these elements are trivalent, R3+, but several of them have other valences.
24 de jun. de 2024 · rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 ( scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table ( cerium [Ce] through lutetium [Lu]).
Because of that compositional simplicity, their properties can be surmised, at least partially, from the location of their constituent atoms in the periodic table. This Quick Study explores the influence of the rare earths’ electronic structure on their properties and applications.
1 de ene. de 2016 · Current theoretical understanding of electronic structure and spectroscopy of rare-earth ions in a condensed matter environment is reviewed. The development of the crystal-field effective Hamiltonian for the 4f n configuration, and its extension to the 4f n−1 5d configuration, is discussed.
A table listing the 17 rare-earth elements, their atomic number and symbol, the etymology of their names, and their main uses (see also Applications of lanthanides) is provided here.
1 de feb. de 2019 · Rare earths are characterized by the prevalence of the trivalent oxidation state; however, some electronic configurations stabilize the divalent (Eu II, 4f 7) or the tetravalent (Ce IV, 4f 0) states under ambient conditions.
• Use literature and new data for electronic energy levels, magnetic, and hyperfine splitting. • Directional magnetic data is crucial to fixing orientation of CF Hamiltonian for low-symmetry sites. • Separately calculate: • Electronic energy levels • Magnetic splitting for various field orientations • Hyperfine splitting.
