Unit cell vectors:
va= 5.25600000  0.00000000  0.00000000
vb= 0.00000000  7.45000000  0.00000000
vc= 0.00000000  0.00000000  8.15900000
18
O  0.00000000  1.94594000  0.00000000  
O  2.62800000  5.50406000  0.00000000  
O  0.00000000  5.50406000  0.00000000  
O  2.62800000  1.94594000  0.00000000  
O  1.31400000  0.00000000  1.18713450  
O  3.94200000  0.00000000  6.97186550  
O  1.31400000  2.41007500  2.22577520  
O  3.94200000  5.03992500  5.93322480  
O  3.94200000  2.41007500  5.93322480  
O  1.31400000  5.03992500  2.22577520  
O  2.62800000  3.72500000  4.07950000  
O  0.00000000  3.72500000  4.07950000  
Si  1.31400000  1.57269500  0.85016780  
Si  3.94200000  5.87730500  7.30883220  
Si  3.94200000  1.57269500  7.30883220  
Si  1.31400000  5.87730500  0.85016780  
Si  1.31400000  3.72500000  3.15345350  
Si  3.94200000  3.72500000  5.00554650