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Figure 4
Each [SiO4] tetrahedron can occupy one of two different possible orientations, A or B, that are drawn in purple and blue color, respectively. The orientation of any tetrahedron within a chain determines the orientation of all other tetrahedra adjacent along the a axis. 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