view article

Figure 1
The structure of (a) the vacant cage with its centre at (3/8, 0, 1/4) and (b) two vacant cages related by the threefold axis in blue. Ca1, Al1, Al2, O1 and O2 ions are drawn as olive, purple, light blue, red and orange balls. Four O3 ions are added in (a) for the sake of comparison.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Follow Acta Cryst. B
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds