Enter a species  (e.g. Al, Fe): Rb
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003
Enter hexagonal lattice constants 'a' and 'c' (m): 4.279273166005265e-10, 6.988163239817056e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -7.798557
         Iterations: 76
         Function evaluations: 191

Finished calculation

C11 = 179.27259103141955 GPa
C12 = 47.97918838081582 GPa
  B = 91.74365593101706 GPa