lattice_vector           4.62000000        0.00000000        0.00000000
lattice_vector           0.00000000        4.62000000        0.00000000
lattice_vector           0.00000000        0.00000000        4.62000000
atom          0.000000        0.000000        0.000000  Na  
atom          0.500000        0.000000        0.000000  F