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Atom positions are idealized and given with respect to the MDO3/4 cell (c = 4c 0).
| Polytype | (x,y,0) T | (−x,y,0) T | (x,y,1\over 4) T | (−x,y,1\over 4) T |
|---|---|---|---|---|
| MDO3 | 1 | 0 | 1 | 0 |
| MDO4 | 1 | 0 | 0 | 1 |
| MDO3/4 (1 − x : x) | 1 | 0 | 1 − x | x |
| MDO3/4 (1 − x : x) refined in I{\overline 4}2d | (1+ x)/2 | (1 − x)/2 | (1 − x)/2 | (1 + x)/2 |
