Question

In tetragonal crystal system, which of the following is not true?

(a) All axial lengths and all axial angles are equal.

(b) All three axial lengths are equal.

(c) All three axial angles are equal.

(d) Two axial angles are equal but the third is different.

Answer 1

Correct option  (c) All three axial angles are equal.

Explanation: 

In tetragonal system,

a = b ≠ c, α =  β = γ = 90°