 | Acta Crystallographica Section A Acta Crystallographica Section A FOUNDATIONS AND ADVANCES |
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![[Figure 2]](sc5138fig2mag.jpg)
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Figure 2
(a) The two-dimensional group p1 and its ASU (marked in blue) encompassing the whole unit cell (black). All vertices are equivalent by translation and the two edges in each parallel pair are also equivalent. (b) The ASU (blue) of the unit cell (black) of the two-dimensional group p3. The three vertices 1, 3 and 4 are positioned at the threefold axes. The vertices 2, 5 and 6 are equivalent by the threefold axes. The pairs of edges 1–2/1–5, 3–2/3–6 and 4–5/4–6 are also equivalent by the operation of the threefold axes. |
![[Figure 2]](sc5138fig2.jpg)
| FOUNDATIONS ADVANCES |
ISSN: 2053-2733
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