eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences August 2008 20 2 237 242 jusps-B 1292 article S.R. Pandit 1 B.D. Dwary 2 S.K. Yadav 3 L.B. Prasad 4 P.G. Department of Physics, S.K.M., University, Dumka, Jharkhand (INDIA) Department of Physics, Sahibganj College, Sahibganj Department of Physics, C.P. College, Ramgarh Research Scholar Jharkhand (INDIA) <p style="text-align:justify">Expanding energy as a function of volume in a Taylor series and using different order Pade&#39;approximants, various equations of states have been obtained which have been combined with quasi-harmonic approximation for free energy to study the compression of BaS crystals at high pressures (up to 80 kbar). The results obtained are reasonaly good, lending support to the equations of state and the method used to extend their applicability.<br /> &nbsp;</p> https://ultraphysicalsciences.org/paper/1292/ Volume-compression Bulk modulus Isothermal compressibility