Issue 70, 2014
From the journal:

Chemical Communications

Synthesis of U3Se5 and U3Te5 type polymorphs of Ta3N5 by combining high pressure–temperature pathways with a chemical precursor approach†

Ashkan Salamat,*a   Katherine Woodhead,b   S. Imran U. Shah,c   Andrew L. Hector*c  and  Paul F. McMillan*c  

* Corresponding authors

a Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138, USA
E-mail: salamat@physics.harvard.edu

b Department of Chemistry, Christopher Ingold Laboratory, University College London, London, WC1H 0AJ, UK

c Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
E-mail: a.l.hector@soton.ac.uk, p.f.mcmillan@ucl.ac.uk

Abstract

Combining metastable precursors with high pressure–temperature treatment is a powerful tool to make nitrogen-rich metal nitrides. Two new dense polymorphs of Ta3N5 have previously been theoretically predicted, with U3Se5 (Pnma) and U3Te5 (Pnma) structure types, and are now shown to exist. Amorphous Ta3N5 from thermal ammonolysis of an amorphous polymeric precursor was laser heated at 22 GPa and examined using synchrotron X-ray diffraction to reveal the emergence of these two novel polymorphs.

Graphical abstract: Synthesis of U3Se5 and U3Te5 type polymorphs of Ta3N5 by combining high pressure–temperature pathways with a chemical precursor approach

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Article information

DOI
https://doi.org/10.1039/C4CC05147E
Article type
Communication
Submitted
04 Jul 2014
Accepted
11 Jul 2014
First published
11 Jul 2014

Chem. Commun., 2014,50, 10041-10044

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Synthesis of U3Se5 and U3Te5 type polymorphs of Ta3N5 by combining high pressure–temperature pathways with a chemical precursor approach

A. Salamat, K. Woodhead, S. I. U. Shah, A. L. Hector and P. F. McMillan, Chem. Commun., 2014, 50, 10041 DOI: 10.1039/C4CC05147E

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