How to fit Birch-Munaghan in OriginLab

[elsafo]

Hello, I need to do fitting using Birch-Murnaghan equation to determine the equilibrium lattice constant. I want to use originlab, anyone can help me?

 

[Hyo X]

http://www.originlab.com/forum/

http://en.wikipedia.org/wiki/Birch–Murnaghan_equation_of_state