Sodium arsenide
 | |
| Identifiers | |
|---|---|
| 12044-25-6 | |
| ECHA InfoCard | 100.031.762 |
| Properties | |
| Na3As | |
| Molar mass | 143,89 g·mol−1 |
| Appearance | violet brown solid |
| Density | 2,36 g·cm−3 |
| hydrolysis | |
| Hazards | |
| Main hazards | toxic |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Sodium arsenide is the inorganic compound with the formula Na3As. It is a dark colored solid that degrades upon contact with water or air. It is prepared by the reaction of the elements at 200-400 °C.[1] The compound is mainly of interest as exhibiting a archetypal structure. The normal pressure "sodium arsenide" phase is adopted by many alkali metal pnictides. At 3.6 gigapascals, Na3As adopts the Li3Bi structure, which is another archetypal structure.[2]
At high pressures, Na3As adopts this cubic structure (the so-called Li3Bi motif).
References
- ↑ E. Dönges "Alkali Metals" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 986.
- ↑ Beister, H.J.; Syassen, K.; Klein, J."Phase transition of Na3As under pressure" Zeitschrift fuer Naturforschung, B: Chemical Sciences 1990, volume 45, p1388-p1392. doi:10.1515/znb-1990-1007
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