Figure 3.

Schematic view of: (a) the clay film within the NMR tube inserted into the detection coil (see text) and (b) the clay suspensions into the NMR tube. The $X_L$ and $Z_L$ directors are parallel to the axes of the NMR detection coil and the static magnetic field $B_0$ respectively. The ${\theta }^{LF}$ Euler angle and the director ${\overrightarrow{n}}^{LF}$ characterise the orientation of the clay sample by reference to the static magnetic field $B_0$. Reprinted with permission from [23]. Copyright (2014) American Chemical Society.