# Kumari-Dass equation of state

**Kumari and Dass**^{[1]}^{[2]} presented a model based on a linear bulk modulus equation, in the spirit of the Murnaghan equation of state. The equation of state does not correctly model the bulk modulus as the pressure, , tends towards infinity, as it remains bounded. This is apparent in the equation relating the bulk modulus to pressure:

where is the isothermal bulk modulus, is the pressure derivative of the bulk modulus and is a softening parameter for the bulk modulus. This leads to a equation for pressure dependent on these parameters of the form:

## References[edit]

- ↑ M. Kumari and N. Dass "An equation of state applied to sodium chloride and caesium chloride at high pressures and high temperatures", Journal of Physics: Condensed Matter
**2**pp. 3219-3229 (1009) - ↑ M. Kumari and N. Dass "An equation of state applied to 50 solids. II", Journal of Physics: Condensed Matter
**2**pp. 7891-7895 (1990)