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| (a). I 41 2 2 with origin at 222 and 4112 at 1/4,3/4,3/8. |
| (b). I 41 2 2 with origin at 4112 and 222 at 1/4,1/4,3/8. |
Note: further choices of origin may be required to show group-subgroup relationships for this space group.