O atom in a box
 1.0          ! universal scaling parameters
 7.0 0.0 0.0  ! lattice vector  a(1)
 0.0 7.5 0.0  ! lattice vector  a(2)
 0.0 0.0 8.0  ! lattice vector  a(3)
1             ! number of atoms
cart          ! positions in cartesian coordinates
 0 0 0
