Perovskite unit cell
1.0
  4.000000000  0.000000000  0.000000000
  0.000000000  4.000000000  0.000000000
  0.000000000  0.000000000  4.000000000
  Sr Ti O
  1 1 3
Direct
  0.000000000 0.000000000 0.000000000
  0.5000000000 0.5000000000 0.5000000000
  0.5000000000 0.5000000000 0.000000000
  0.000000000 0.5000000000 0.5000000000
  0.5000000000 0.000000000 0.5000000000
