Calcium nitride
 Unit cell containing 31 nitride ions (red) and 48 calcium ions (white). Each nitride is surrounded by six calcium, and each calcium by four nitride ions.
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| Names | |
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| IUPAC name
Calcium nitride
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| Other names
tricalcium dinitride
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.031.435 |
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PubChemCID
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CompTox Dashboard(EPA)
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| Properties | |
| Ca3N2 | |
| Molar mass | 148.248g·mol−1 |
| Appearance | red-brown crystalline solid |
| Density | 2.670 g/cm3 2.63 g/cm3(17 °C) |
| Melting point | 1,195 °C (2,183 °F; 1,468 K) |
| decomposes | |
| Structure | |
| Cubic,cI80 | |
| Ia-3, No. 206 | |
| Related compounds | |
Otheranions
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Othercations
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Beryllium nitride Magnesium nitride Strontium nitride Barium nitride Radium nitride Zinc nitride Aluminium nitride Lithium nitride Sodium nitride Potassium nitride |
Related compounds
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Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).
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Calcium nitrideis theinorganic compoundwith thechemical formulaCa3N2.[1]It exists in various forms (isomorphs), α-calcium nitride being more commonly encountered.
Structure
[edit]α-Calcium nitride adopts an anti-bixbyitestructure, similar toMn2O3,except that the positions of the ions are reversed: calcium (Ca2+) take the oxide (O2−) positions and nitride ions (N3−) the manganese (Mn3+). In this structure, Ca2+occupies tetrahedral sites, and the nitride centres occupy two different types of octahedral sites.[2]
Synthesis and reactions
[edit]Calcium nitride is formed along with the oxide,CaO,when calcium burns in air. It can be produced by direct reaction of the elements:[3]
- 3 Ca + N2→ Ca3N2
It reacts with water or even the moisture in air to giveammoniaandcalcium hydroxide:[4]
- Ca3N2+ 6 H2O → 3 Ca(OH)2+ 2 NH3
Likesodium oxide,calcium nitride absorbs hydrogen above 350 °C:
- Ca3N2+ 2 H2→ 2 CaNH +CaH2
General references
[edit]- Greenwood, Norman N.;Earnshaw, Alan (1997).Chemistry of the Elements(2nd ed.).Butterworth-Heinemann.ISBN978-0-08-037941-8.
References
[edit]- ^Eagleson, M. (1994).Concise Encyclopedia Chemistry.Walter de Gruyter. p.160.ISBN3-11-011451-8.
Calcium nitride.
- ^Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press.ISBN0-19-855370-6.
- ^P. Ehrlich “Calcium, Strontium, Barium Nitrides Ca3N2,Sr3N2,Ba3N2”in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 940-1.
- ^Heyns, A. (1998). "The Vibrational Spectra and Decomposition of α-Calcium Nitride (α-Ca3N2) and Magnesium Nitride (Mg3N2) ".Journal of Solid State Chemistry.137(1): 33–41.Bibcode:1998JSSCh.137...33H.doi:10.1006/jssc.1997.7672.
External links
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