(Return link to main list of space groups in standard settings.)
| (a). P 4 / n with origin at -4 and -1 at 1/4,1/4,0. |
| (b). P 4 / n with origin at -1 and -4 at 1/4,3/4,0. |
| (c). P 4 / n with origin at -1 and -4 at 1/4,1/4,0. |
| (d). P 4 / n with origin at 4/n and -1 at 1/4,1/4,0. |