16
 
O     2.6925886    0.2347055    0.0468335 
Si    0.3997094   -0.9704147   -1.7210374 
O    -0.2119610    1.9507458    1.4115632 
H     0.5678178    0.6054454   -1.6799296 
H     3.3868421    0.1269465    0.7167195 
P     2.6184625   -1.2046992   -1.0222993 
H    -1.9634529    0.6769646   -0.8718094 
H    -2.9967327   -0.4919453   -0.0601290 
H     0.1914275   -0.8896696    0.7136410 
Al   -1.7761722    1.2886681    1.4832634 
H    -2.8724660    1.6866426    2.5592981 
Mg    0.8084635    0.9074497    0.2824164 
C    -2.0114901   -0.0147538   -0.0103620 
H     3.1454811   -0.5316600   -2.1595467 
H    -1.1320531   -2.2514531    0.2992908 
B    -0.8464646   -1.1229725    0.0120877 
