Key points are not available for this paper at this time.
The structure of the title compound consists of distorted B12 icosahedra linked by N—B—N chains. The compound crystallizes in the rhombohedral space group R3m (No. 166). The unit cell contains four symmetry-independent atom sites, three of which are occupied by boron in the 18h, 18h (site symmetry m) and 3b (site symmetry 3m) Wyckoff positions and one by nitrogen (in the 6c Wyckoff position, site symmetry 3m). Two of the B atoms form the icosahedra, while N atoms link the icosahedra together. The main feature of the structure is that the 3b position is occupied by the B atom, which makes the structure different from those of B6O, for which these atom sites are vacant, and B4+xC1−x, for which this position is randomly occupied by both B and C atoms.
Kurakevych et al. (Fri,) studied this question.