documentclass[12pt]{extarticle}
 ...
 begin{document}
  ...
 begin{multicols}{2}
 POSCAR\
 fcc (100)\
 surface\
  3.53\
    0.50000   0.50000    .00000\
   -0.50000   0.50000    .00000\
    0.00000   0.00000   5.00000\

...
end{multicols}