# What kind of geometry does SiO_2 have?

The $\text{Si}$ atom in ${\text{SiO}}_{2}$ has tetrahedral geometry.
${\text{SiO}}_{2}$ is a network solid in which every $\text{Si}$ atom (black) is attached to four oxygen atoms (red):
With a steric number of 4, the $\text{Si}$ atom has a tetrahedral geometry.