โ Scribed by Dong, Yongkwan ;DiSalvo, Francis J.
No coin nor oath required. For personal study only.
The structure of trisodium phosphide, Na 3 P, known from X-ray powder diffraction data, has been refined based on single-crystal data. The compound crystallizes in the hexagonal A 3 B (A = alkali metal and B = group 15 element) structure type and is isotypic with the homologous potassium phase. The framework is built of Na + and P 3ร ions arranged in two kinds of layers perpendicular to the c axis. Two of the Na atoms and the P atom reside at positions of 6m2 (2b), 3m (4f) and 6m2 (2c) site symmetry, respectively.
๐ SIMILAR VOLUMES
Single-crystal X-ray study T = 150 K Mean '(SeยฑGe) = 0.003 A ร R factor = 0.056 wR factor = 0.145 Data-to-parameter ratio = 15.5 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The structure of the title pentaborate, [Pb 2 (B 5 O 9 )Br] (dilead pentaborate bromide), known from powder data, has been reยฎned based on single-crystal data (R = 0.034) and is discussed in terms of intercrossing anionic and cationic frameworks.