Ab initio determination of structural and dynamical properties of Mg2Sn

We have studied structural and dynamical properties of Mg2Sn by employing an ab-initio pseudopotential method and a linear response scheme, within the generalised gradient approximation. The calculated lattice constant, bulk modulus and pressure derivative of bulk modulus are in agreement with previous ab-initio calculations and available experimental results. The calculated phonon spectra are in good agreement with inelastic neutron scattering measurements along the main symmetry directions.