Abstract
The generalised exponential potential and the Born-Mayer potential are employed to describe the paired and the unpaired interactions in the hexagonally closed pack (hcp) metals. These forces are found to explain simultaneously the phonon dispersion and the elastic behaviours of the metals like Scandium (Sc), Zirconium (Zr) and Magnesium (Mg). The input data for lattice constants inverse compressibility and cohesive energy give rise to such results on the said behaviour of the metals which compare satisfactorily with the experimental values.
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