Reply to the ‘Comment on “A new equation of state based on Grover, Getting and Kennedy’s empirical relation between volume and bulk modulus. The high-pressure thermodynamics of MgO”’ by S. Raju, E. Mohandas and K. Sivasubramanian, Phys. Chem. Chem. Phys., 2001, 3, 1391

The Comment of Raju et al. brings out certain interesting features of our recently developed equation of state. In an elegant way they derive simple expressions for the Anderson–Gruneisen parameter and the thermal expansivity as a function of volume. Their results are a useful extension of the theory we have presented in our previous paper. However, we wish to take the opportunity to set right a number of their deductions. In particular we would like to comment on (i) the use of the Anderson–Gruneisen parameter; (ii) the constancy of the property αK; and (iii) the plot of volume against ln(α/α0).