top_sym input

1. file_in (a40) : sbf input file
2. nop (free format) : number of symmetry operations (≤ 3)
3. nop times
   1. name_op (a3) : symmetry operation symbol (see table)
   2. xc, yc, zc (free format) : coordinates defining the operation (see table)

symbol	operation	xc, yc, zc
INV	inversion	center of inversion coordinates
PLX	x=xc plane	xc, 0.0, 0.0
PLY	y=yc plane	0.0, yc, 0.0
PLZ	z=zc plane	0.0, 0.0, zc
PXY	y=x+yc plane	0.0, yc, 0.0
PYX	y=-x+yc plane	0.0, yc, 0.0
PXZ	z=x+zc plane	0.0, 0.0, zc
PZX	z=-x+zc plane	0.0, 0.0, zc
PYZ	z=-y+zc plane	0.0, 0.0, zc
PZY	z=y+zc plane	0.0, 0.0, zc
C2X	C2(x) axis	0.0, yc, zc intersection with x=0.0 plane
C2Y	C2(y) axis	xc, 0.0, zc intersection with y=0.0 plane
C2Z	C2(z) axis	xc, yc, 0.0 intersection with z=0.0 plane
C4X	C4(x) axis	0.0, yc, zc intersection with x=0.0 plane
C4Y	C4(y) axis	xc, 0.0, zc intersection with y=0.0 plane
C4Z	C4(z) axis	xc, yc, 0.0 intersection with z=0.0 plane
S4X	S4(x) axis	xc, yc, zc center of inversion coordinates
S4Y	S4(y) axis	xc, yc, zc center of inversion coordinates
S4Z	S4(z) axis	xc, yc, zc center of inversion coordinates
CTX	C4(x) screw axis	yc, zc intersection, xc translation with x=xc plane
CTY	C4(y) screw axis	xc, zc intersection, yc translation with y=yc plane
CTZ	C4(z) screw axis	xc, yc intersection, zc translation with z=zc plane

Symmetry operations symbols and coordinates.