Question

$Ti{O}_2$ is a well known example of :

• A. triclinic system
• B. tetragonal system
• C. monoclinic System
• D. none of the above

Answer 1

The correct option is B tetragonal system

Tetragonal crystal lattice result from stretching a cubic lattice along with one of its lattice vectors so that the cube becomes a rectangular prism with a square base and a height.

The titanium cations have a coordination number of $6$ meaning they are surrounded by an octahedron of $6$ oxygen atoms. The oxygen anions have a co-ordination number of $3$ resulting in trigonal planar coordination. Rutile also shows a screw axis when its octahedral are viewed sequentially.