Ellipsoidal clathrate structure

Each sublattice of this ellipsoidal clathrate structure contains both diol 10 enantiomers. However, interpenetration creates fourfold screw axes of both handedness. Only one diol enantiomer participates in the 4i axes, and only the other... 

The ellipsoidal clathrate structure contains both enantiomers, whereas the helical tubulate structure contains only one. It follows, therefore, that a sample of... 

Fig. 2.4 Defects in the crystal structure of clathrate-I KgSn44n2 (top) environment of the Snl position in the (100) plane middle) displacement ellipsoids in the (100) plane without taking into account the splitting of the Sn3 position left) and considering the splitting into Sn31 and Sn32 right) together with the difference density distribution at r = 300 K and T = 80 K bottom) different local atomic arrangements without left) and with right) defect at the Snl position...

---