A crystal has a=bneq c with alpha=beta=gamma=90 deg. The crystal system is

JEE Main levelSingle correct optionDifficulty 2 of 3ss022

A crystal has $a = b \neq = c$ with $α = β = γ = 9 0^{\circ}$ . The crystal system is

Two equal edges and one unequal edge with all angles

9 0^{\circ}

define the tetragonal system. Cubic has

a = b = c

, orthorhombic has

a \neq = b \neq = c

and hexagonal has

γ = 12 0^{\circ}