Structure of α-quartz SiO2
The structure of α-quartz SiO2 is described
by the space group P3221 and its hexagonal
primitive vectors are:
Table 1 shows the coordinates of Si and O in
α-quartz SiO2 structure consisting of 18 Si and 26
O. The structures of Si18O26 and Si18O26H32 are shown
in Figure 1(a) and Figure 1(b) respectively