# "lattice_vector" is not necessary.
# But if it is there, it should be there at least three times -- to specify all the three vectors.
# atom_frac cannot be used unless the three "lattice_vectors" have been specified.
# the location of this specification in the file does not matter -- it can even be at the end of the file.
#
atom     0.0   0.0   0.0  Au
atom     0.0   0.0   3.0  Au
