 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 2]](ck5037fig2mag.jpg)
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Figure 2
Tetrahedral representation of incommensurately modulated low tridymite. The cell edges refer to a 3 × 1 × 2 commensurate approximation to the incommensurate superstructure. (a) View along the pseudo-hexagonal c axis at ditrigonal six-membered rings of tetrahedra with alternating tetrahedra pointing up and down. (b) View along the b axis at six-membered rings of tetrahedra with pairs of tetrahedra pointing to the same direction (cis configuration). The displacive modulation consists of a combination of wavy shifts and tilting of the tetrahedra. |
![[Figure 2]](ck5037fig2.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
