view article
Figure 7
Approximante structure of 2 × 0.5 × 10 unit cells showing the [Si2O5] layer. Blue and purple color for the [SiO4] tetrahedra display the two different orientations A and B, respectively, green spheres: Rb. Notably, two or three chains are of the same orientation, then the orientation switches. Furthermore, four- and eightfold rings between adjacent chains have a different configuration between neighboring AA, AB, BB and BA chains. Displacement ellipsoids for oxygen (red) and rubidium atoms (green) are shown at the 50% probability level.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 82| Part 5| October 2026|
https://doi.org/10.1107/S205252062600819X