Consider the following five sets of unit cell parameters: I. a=b=c , α=β=γ=90^ II. a=b≠ c , α=β=γ=90^ III. a≠ b≠ c , α=β=γ=90^ IV. a≠ b≠ c , α=γ=90^ , β≠ 90^ V. a=b≠ c , α=β=90^ , γ=120^ The number of crystal systems

Question

Quantrex Academy · Accepted Answer

Correct answer: 2

The given sets of parameters correspond to the following crystal systems:
I. Cubic
II. Tetragonal
III. Orthorhombic
IV. Monoclinic
V. Hexagonal

Among the 14 Bravais lattices, a face-centred unit cell is found only in the Cubic and Orthorhombic crystal systems.
Therefore, out of the given 5 systems, exactly 2 (Cubic and Orthorhombic) can exhibit a face-centred unit cell.

Answer:

2

Consider the following five sets of unit cell parameters: I. a=b=c...

Correct answer

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