18

Si          -0.206865   1.118783   0.000000
Si           0.206865  -1.118783   0.000000
Si          -0.198349  -2.209140   1.940351
Si           0.198349   2.209140   1.940351
Si          -0.198349   1.107904   3.825347
Si           0.198349  -1.107904   3.825347
Si           0.198349   2.209140  -1.940351
Si          -0.198349  -2.209140  -1.940351
Si          -0.198349   1.107904  -3.825347
Si           0.198349  -1.107904  -3.825347
H           -0.076102   3.676483   1.936181
H            0.015487   1.828864  -5.114309
H           -0.076102   3.676483  -1.936181
H            0.076102  -3.676483  -1.936181
H           -0.015487  -1.828864  -5.114309
H            0.076102  -3.676483   1.936181
H           -0.015487  -1.828864   5.114309
H            0.015487   1.828864   5.114309
