1.11 Name the parameters that characterise a unit cell.
A unit cell is characterised by:-
(i) its dimensions along the three edges a, b and c. These edges may or may not be mutually perpendicular.
(ii) angles between the edges, α (between b and c), β (between a and c) and γ (between a and b). Thus, a unit cell is characterised by six parameters
a, b, c, α, β and γ.