Multiple choice

In which of the following types of crystal systems, all unit cell vector angles are equal?

  1. Hexagonal
  2. Monoclinic
  3. Orthorhombic
  4. Tetragonal

  1. 1 and 2

  2. 1 and 3

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4
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E Correct answer
Explanation

Orthorhombic crystal system: Unit cell vector lengths a ≠ b ≠ c and unit cell vector angles α = β = γ = 90° Tetragonal crystal system: Unit cell vector lengths a = b ≠ c and unit cell vector angles α = β = γ = 90°

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