Spiral Cross Shape

Create a spiral cross shape to be used in the construction of a unit cell.

On the Periodic Structures tab, in the Shapes group, from the  Crosses drop-down list, select   Spiral Cross.

	Arm length (L)	The arm length from the origin (all directions).
	Edge length (Le)	The arm length of the first extension.
	Edge length (Ls)	The arm length of the last extension.
	Strip width (Ws)	The width of the strip.