Generalized free volume theory of the Grüneisen parameter at infinite pressure
A generalized version of the free volume theory of the Grüneisen parameter has been used here to derive expressions for the second order and third order Grüneisen parameters at extreme compression (volume tends to zero). The method adopted in the present study makes use of some basic principles of calculus. The results obtained are free from any assumptions and thus represent identities in terms of pressure derivatives of bulk modulus for materials at infinite pressure.
Keywords: Free volume theory, Grüneisen parameter, extreme compression behaviour, pressure derivatives of bulk modulus