O atom in a box
 1.0          ! scaling parameters
 7.0 0.0 0.0  ! lattice vector 1
 0.0 7.5 0.0  ! lattice vector 2
 0.0 0.0 8.0  ! lattice vector 3
1             ! number of atoms
Cartesian     ! positions in Cartesian coordinates
 0 0 0        ! position of the atom