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High-pressure synthesis and structural behavior of sodium orthonitrate Na3NO4

Cabrera, RQ; Sella, A; Bailey, E; Leynaud, O; McMillan, PF; (2011) High-pressure synthesis and structural behavior of sodium orthonitrate Na3NO4. Journal of Solid State Chemistry , 184 (4) 915 - 920. 10.1016/j.jssc.2011.02.013. Green open access

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Abstract

Sodium orthonitrate (Na3NO4) is an unusual phase containing the first example of isolated tetrahedrally bonded NO43- groups. This compound was obtained originally by heating together mixtures of Na2O and NaNO3 for periods extending up to > 14 days in evacuated chambers. Considering the negative volume change between reactants and products, it was inferred that a high-pressure synthesis route might favor the formation of the Na3NO4 compound. We found that the recovered sample is likely to be a high-pressure polymorph, containing NO43- groups as evidenced by Raman spectroscopy. The high-pressure behavior of Na3NO4 was studied using Raman spectroscopy and synchrotron X-ray diffraction in a diamond anvil cell above 60 GPa. We found no evidence for major structural transformations, even following laser heating experiments carried out at high pressure, although broadening of the Raman peaks could indicate the onset of disordering at higher pressure.

Type: Article
Title: High-pressure synthesis and structural behavior of sodium orthonitrate Na3NO4
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jssc.2011.02.013
Publisher version: http://doi.org/10.1016/j.jssc.2011.02.013
Language: English
Keywords: Sodium orthonitrate, Sodium oxide, Sodium nitrate, High-pressure synthesis, Diamond anvil cell, Pressure-induced amorphization
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1334048
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