Enter a species  (e.g. Al, Fe): Ga
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: SW_BereSerra_2006_GaN__MO_861114678890_001
Enter hexagonal lattice constants 'a' and 'c' (m): 2.636839570943266e-10, 4.305940988260218e-10