Linked from
The 10 pages that link to Tetragonal crystal system, each with the reason it gives.
Crystal systemBroader topic: It retains a fourfold axis while relaxing cubic edge equality.
Cubic crystal systemCompared with: It shares cubic right angles but has only two equal-length axes.
AnataseRelated: Anatase's crystal structure belongs to this system.
ScheeliteRelated: Scheelite crystallizes in this system, shaping its symmetry and crystal forms.