12 symmetry operations:
1 x,y,z identity 2 x-y,-y,z+1/2 c-glide plane|translation: 0 0 1/2 3 -y,x-y,z C3 axis 4 -x,-y,z+1/2 2-fold screw axis|translation: 0 0 1/2 5 x,x-y,z mirror plane 6 -y,-x,z mirror plane 7 x-y,x,z+1/2 6-fold screw axis|translation: 0 0 1/2 8 -x+y,-x,z C3 axis 9 y,x,z+1/2 c-glide plane|translation: 0 0 1/2 10 -x,-x+y,z+1/2 c-glide plane|translation: 0 0 1/2 11 y,-x+y,z+1/2 6-fold screw axis|translation: 0 0 1/2 12 -x+y,y,z mirror plane