Iron Allotrope Comparison  
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In this directory we perform a fit of the total energy as a function of the 
unit cell volume to the Murnaghan equation of state to find the equilibrium 
lattice parameter, total energy, and bulk modulus. 


1. Examine the notebook. What is it calculating? 
   What are the inputs? What are the outputs? Then execute the script.

2. Examine the 4 curves. Which crystal structure does each functional predict as the ground state?
   Experimentally what is the known ground state?

