In a hexagonal crystal, the unit cell has two edges of the same length, forming a 60 degree angle with a third, perpendicular edge, and the other three edges are of equal length, forming 120 degree angles with the other edges.
In a hexagonal crystal, the unit cell has two edges of the same length, forming a 60 degree angle with a third, perpendicular edge, and the other three edges are of equal length, forming 120 degree angles with the other edges.