Potassium nitride
| Names | |
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| IUPAC name
Potassium nitride
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| Identifiers | |
3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| K3N | |
| Molar mass | 131.3016 g/mol |
| Appearance | Slightly yellow crystalline solid |
| Melting point | −10 °C (14 °F; 263 K)[1] (decomposes) |
| Related compounds | |
Other cations
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Lithium nitride Sodium nitride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium nitride is an unstable chemical compound. Several syntheses were erroneously claimed in the 19th century, and by 1894 it was assumed that it did not exist.[2]
However, a synthesis of this compound was claimed in 2004. It is observed to have the anti-TiI
3 structure below 233 K (−40 °C; −40 °F), although a Li
3P-type structure should be more stable. Above this temperature, it converts to an orthorhombic phase. This compound was produced by the reaction of potassium metal and liquid nitrogen at 77 K (−196.2 °C; −321.1 °F) under vacuum:[1]
- 6K + N2 → 2K3N
This compound decomposes back into potassium and nitrogen at room temperature.
This compound is unstable due to steric hindrance.
References
- ^ a b Fischer, D.; Cancarevic, Z.; Schön, J. C.; Jansen, M. (January 2004). "Zur Synthese und Struktur von K3N". Zeitschrift für anorganische und allgemeine Chemie (in German). 630 (1): 156–160. doi:10.1002/zaac.200300280.
- ^ Chemical Society (Great Britain) (1894). Journal - Chemical Society, London. Chemical Society. pp. 512–.
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