World Library  
Flag as Inappropriate
Email this Article

Sodium nitride

Article Id: WHEBN0012644933
Reproduction Date:

Title: Sodium nitride  
Author: World Heritage Encyclopedia
Language: English
Subject: Sodium zincate, Sodium hypophosphite, Sodium bismuthate, Sodium metaborate, Sodium superoxide
Publisher: World Heritage Encyclopedia

Sodium nitride

Sodium nitride
CAS number  YesY
Related compounds
Other anions Sodium imide Sodium amide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY   YesY/N?)

Sodium nitride (Na3N) is the lithium nitride and many other nitrides, sodium nitride is an extremely unstable alkali metal nitride. It can be generated by combining atomic beams of sodium and nitrogen deposited onto a low-temperature sapphire substrate.[1] It decomposes into its elements:

2 Na3N → 6 Na + N2


Sodium is salt.Sodium nitride can be synthesized in two different ways: by the thermal decomposition of NaNH2 or by the direct reaction of the elements.[2] The most common way to successfully synthesize sodium nitride has been done by Dieter Fischer & Martin Jansen and Grigori Vajenine using the latter method. The first way is to introduce desired ratios of Na and N2 in gas phase separately and depositing them in a vacuum chamber on a cooled substrate, which is then heated to room temperate (298K) to crystallize.[1] The second method is to react elemental sodium with plasma activated nitrogen on a metal surface. This synthesis can be further facilitated by introducing liquid Na-K alloy to the compound with the excess liquid removed and washed with fresh alloy. The solid is then separated from the liquid using a centrifuge. However Vajenine’s method is very air-sensitive and can decompose and combust rapidly, unless exposed to a pure oxygen (O2) environment.[3]


Sodium nitride can be of reddish brown or dark blue color depending on the synthesis of the compound due to intrinsic properties.[1][3] It shows no signs of decomposition after several weeks when at room temperature.[3] The compound does not have a melting point as it decomposes back into its elemental forms as demonstrated using mass spectrometry around 360K.[1][2] The estimated enthalpy of formation for the compound is +64 kJ/mol.[3]


Sodium nitride seems to be about 90% ionic at room temperature but has the band gap typical for a semiconductor.[2][3] It adopts the anti-ReO3 structure with a simple lattice made up of NNa6 octahedra.[1][2][3][4] The compound has N-Na bond lengths of 236.6pm.[1][3] This structure has been confirmed through X-ray diffraction and more recently neutron diffraction on powder and single-crystals.[1][2][3][4]


  1. ^ a b c d e f g Fischer, D., Jansen, M. (2002). "Synthesis and structure of Na3N". Angew Chem 41 (10): 1755.  . 'Elusive Binary Compound Prepared' Chemical & Engineering News 80 No. 20 (20 May 2002)
  2. ^ a b c d e Sangster, J. (2004). "N-Na(Nitrogen-Sodium) System". Journal of Phase Equilibria and Diffusion 25 (6): 560–563.  
  3. ^ a b c d e f g h Vajenine, G.V. (2007). "Plasma-Assisted Synthesis and Properties of Na3N". Inorganic Chemistry 46 (13): 5146–5148.  
  4. ^ a b Vajenine, G.V., Hoch, C., Dinnebier, R.E., Senyshyn, A., Niewa, R. (2009). "Plasma-A Temperature-dependent Structural Study of anti-ReO3-type Na3N: to Distort or not to Distort?". Zeitschrift für anorganische und allgemeine Chemie 636 (1): 94–99.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.