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1 Structure  




2 Synthesis and reactions  




3 General references  




4 References  




5 External links  













Calcium nitride






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From Wikipedia, the free encyclopedia
  

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.

Names
IUPAC name

Calcium nitride

Other names

tricalcium dinitride

Identifiers

CAS Number

3D model (JSmol)
  • Interactive image
  • Interactive image
    • ECHA InfoCard 100.031.435 Edit this at Wikidata
    EC Number
    • 234-592-9

    PubChem CID

    CompTox Dashboard (EPA)

    • InChI=1S/3Ca.2N

    • InChI=1S/3Ca.2N/q3*+2;2*-3

    • InChI=1S/3Ca.2N/q;;+2;2*-1

    • [Ca]=N[Ca]N=[Ca]

    • [Ca+2].[Ca+2].[Ca+2].[N-3].[N-3]

    • [Ca]=[N-].[Ca+2].[N-]=[Ca]

    Properties

    Chemical formula

    		 Ca3N2
    Molar mass 148.248 g·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)

    Solubility in water

    		 decomposes
    Structure

    Crystal structure

    		 Cubic, cI80

    Space group

    		 Ia-3, No. 206
    Related compounds

    Other anions
  • Calcium oxide

    • Other cations

    		 Beryllium nitride
    Magnesium nitride
    Strontium nitride
    Barium nitride
    Radium nitride
    Zinc nitride
    Aluminium nitride
    Lithium nitride
    Sodium nitride
    Potassium nitride

    Related compounds
  • Calcium amide
  • Calcium imide

    • Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

    checkY verify (what is checkY☒N ?)

    Infobox references

    Calcium nitride is the inorganic compound with the chemical formula Ca3N2.[1] It exists in various forms (isomorphs), α-calcium nitride being more commonly encountered.

    Structure[edit]

    α-Calcium nitride adopts an anti-bixbyite structure, similar to Mn2O3, 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 give ammonia and calcium hydroxide:[4]

    Ca3N2 + 6 H2O → 3 Ca(OH)2 + 2 NH3

    Like sodium oxide, calcium nitride absorbs hydrogen above 350 °C:

    Ca3N2 + 2 H2 → 2 CaNH + CaH2

    General references[edit]

    References[edit]

    1. ^ Eagleson, M. (1994). Concise Encyclopedia Chemistry. Walter de Gruyter. p. 160. ISBN 3-11-011451-8. Calcium nitride.
  • ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
  • ^ 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[edit]

    Stub icon

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