Find the total number of $\mathrm{Si}-\mathrm{O}-\mathrm{Si}$linkages in ${\mathrm{Ca}}_3{\left({\mathrm{SiO}}_3\right)}_3$

Given compound is,

${\mathrm{Ca}}_3{\left({\mathrm{SiO}}_3\right)}_3$ There are total 3 $\mathrm{Si}-\mathrm{O}-\mathrm{Si}$ linkages present in this compound.

The $\mathrm{Si}-\mathrm{O}-\mathrm{Si}$ linkages enable the polymerization of the silica monomer unit. Two silicon atoms are located around the oxygen atom. Silicon is ${\mathrm{sp}}^3$ hybridized with silica. Silicon is found at the tetrahedral unit's core of the silica structure.