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10/09/2020 7:21 pm
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Differentiate between:
(i) End-centred and face-centred unit cells.
(ii) Monoclinic and hexagonal unit cells.
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10/09/2020 7:25 pm
(i) End centred unit cell:
- They contain particles at the corners and one in the centre of any two opposite faces.
- Total number of particles = 2
Face-centred unit cell:
- They contain particles at the corners and one in the centre of each face.
- Total number of particles = 4
(ii) Monoclinic unit cell:
a = b ≠ c
α = β = 90°
γ = 120°
Hexagonal unit cell
a ≠ b ≠ c
α = γ = 90°
Β ≠ 90°