Least-squares planes (x,y,z in crystal coordinates) and deviations from them
(* indicates atom used to define plane)

PLANE 1
 1.166 (0.047) x + 16.188 (0.031) y - 5.906 (0.087) z = 9.248 (0.051) 

*    0.000 (0.000)  O1
*    0.000 (0.000)  O2
*    0.000 (0.000)  O3
    -0.079 (0.007)  Si
    -1.730 (0.011)  O4
     2.032 (0.014)  N

Rms deviation of fitted atoms =   0.000


PLANE 2
 2.477 (0.232) x + 0.863 (0.172) y + 17.513 (0.009) z = 5.815 (0.275) 

Angle to previous plane (with approximate esd) = 73.15 ( 0.66 )

*    0.000 (0.000)  O1
*    0.000 (0.000)  C1
*    0.000 (0.000)  C6
    -0.206 (0.046)  C7
    -0.030 (0.042)  Si
     0.576 (0.059)  N

Rms deviation of fitted atoms =   0.000


PLANE 3
 8.852 (0.034) x - 8.405 (0.099) y - 3.804 (0.389) z = 7.154 (0.095) 

Angle to previous plane (with approximate esd) = 75.14 ( 1.79 )

*    0.000 (0.000)  O2
*    0.000 (0.000)  C9
*    0.000 (0.000)  C14
    -0.014 (0.042)  C8
    -0.130 (0.040)  Si
    -0.892 (0.053)  N

Rms deviation of fitted atoms =   0.000


PLANE 4
 7.471 (0.174) x + 7.156 (0.272) y + 6.190 (0.282) z = 10.068 (0.192) 

Angle to previous plane (with approximate esd) = 64.62 ( 1.32 )

*    0.000 (0.000)  O3
*    0.000 (0.000)  C16
*    0.000 (0.000)  C21
    -0.148 (0.049)  C15
    -0.042 (0.045)  Si
     0.591 (0.062)  N

Rms deviation of fitted atoms =   0.000

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Selected torsion angles (and their esd)

O2 - Si - O1 - C1    67.21(1.42)  
O3 - Si - O1 - C1  -103.33(1.34)  
O4 - Si - O1 - C1   163.32(1.26)
N - Si - O1 - C1    -17.81(1.27)  
O1 - Si - O2 - C14 -100.53(1.44)  
O3 - Si - O2 - C14   69.95(1.61)  
O4 - Si - O2 - C14  163.17(1.43)  
N - Si - O2 - C14   -15.78(1.44)  
O1 - Si - O3 - C21   66.00(1.46)  
O2 - Si - O3 - C21 -104.50(1.37)  
O4 - Si - O3 - C21  160.92(1.33)  
N - Si - O3 - C21   -19.00(1.34)  
O1 - Si - O4 - C28  -63.30(1.10)  
O2 - Si - O4 - C28   56.79(1.11)  
O3 - Si - O4 - C28  177.03(1.08)  
O1 - Si - N - C15   -74.05(0.86)  
O2 - Si - N - C15   165.99(0.88)  
O3 - Si - N - C15    45.70(0.87)  
O1 - Si - N - C7     45.65(0.87)  
O2 - Si - N - C7    -74.31(0.89)  
O3 - Si - N - C7    165.39(0.89)  
O1 - Si - N - C8    166.32(0.87)  
O2 - Si - N - C8     46.35(0.86)  
O3 - Si - N - C8    -73.94(0.84)  
Si - O1 - C1 - C2   178.43(1.00)  
Si - O1 - C1 - C6     1.56(2.18)