(i) Hexagonal and monoclinic unit cells
Ans: Hexagonal unit cell:
For a hexagonal unit cell
Monoclinic unit cell:
For a monoclinic cell.
(ii) Face-centered and end-centered unit cell
Ans: Face – centered unit cell
In a face-centered unit cell, the constituent particles are present at the corners and one at the centre of each face.
End-centered unit cell
An end-centered unit cell contains particles at the corners and one at the centre of any two opposite faces.