Abstract
AbstractThe lattice vibrational contributions to the internal energy and Helmholtz free energy of alkali metals such as K, Rb, and Cs are studied in the dynamical treatment using the previously developed electronic theory based on pseudopotentials. The pressure effect on the phase diagrams of the CsK, CsRb, and RbK systems are obtained quantitatively considering lattice vibrational contributions. A region of phase mixture is decreased under pressure, and the melting curves under compression show an increase in temperature.
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