- \item $(0,0,0)$ (tetrahedral)
- \item $(-1/8,-1/8,1/8)$ (hexagonal)
- \item $(-1/8,-1/8,-1/4)$, $(-1/4,-1/4,-1/4)$ (110 dumbbell)
+ \item $(0,0,0)$ $\rightarrow$ tetrahedral
+ \item $(-1/8,-1/8,1/8)$ $\rightarrow$ hexagonal
+ \item $(-1/8,-1/8,-1/4)$, $(-1/4,-1/4,-1/4)$
+ $\rightarrow$ 110 dumbbell