Single crystals of the isostructural compounds Ae4[Cr2N6]
(Ae = Ca and Sr) were synthesised from the elements in a mixed sodium–gallium melt at 900 °C. The reactions were performed in sealed niobium tubes with NaN3 as the ![[1 with combining macron]](https://www.rsc.org/images/entities/char_0031_0304.gif)
(No. 2) with similar lattice parameters. The structure contains [Cr2N6]8−, isolated anionic units of edge-sharing tetrahedra that permit
![Graphical abstract: Cr(v)–Cr(v) dimers in Ae4[Cr2N6] (Ae = Ca and Sr)](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=B302015K&imageInfo.ImageIdentifier.Year=2003)
M. S. Bailey and F. J. DiSalvo, Dalton Trans., 2003, 2621 DOI: 10.1039/B302015K
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