Split Ring Shape

Create a split ring shape to be used in the construction of a unit cell.

On the Periodic Structures tab, in the Shapes group, from the  Rings drop-down list, select  Split Ring.

	Outer radius (R)	The outer radius of the ring.
	Inner radius (r)	The inner radius of the ring.
	Start angle ( $\phi$ )	The start angle of the ring.
	Gap angle ( $\theta$ )	The gap angle of the ring.