$cell vectors
1.0
  4.9262976819700732    0.0000000000000000    0.0000000000000000
  0.0000000000000000    4.9262976819700732    0.0000000000000000
  0.0000000000000000    0.0000000000000000    8.2849961015614273
 2 2 4
Direct
  0.0000000000000000    0.0000000000000000    0.2500000000000003 # Rb1
  0.0000000000000000    0.0000000000000000    0.7500000000000001 # Rb2
  0.5000000000000007    0.5000000000000007    0.0000000000000000 # Cu1
  0.5000000000000007    0.5000000000000007    0.4999999999999999 # Cu2
  0.1218999999999999    0.5000000000000007    0.4999999999999999 # C1
  0.8781000000000002    0.5000000000000007    0.4999999999999999 # C2
  0.5000000000000007    0.1218999999999999    0.0000000000000000 # C3
  0.5000000000000007    0.8781000000000002    0.0000000000000000 # C4