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Scientific Reports, volume 5, issue 1, publication number 16902

Exotic stable cesium polynitrides at high pressure

Peng Feng 1, 2
Yunxia Han 1
Hanyu Liu 3
Yansun Yao 4, 5
3
 
Geophysical Laboratory, Carnegie Institution of Washington, NW, Washington, USA
4
 
Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Canada
5
 
Canadian Light Source, Saskatoon, Canada
Publication typeJournal Article
Publication date2015-11-19
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor4.6
ISSN20452322, 20452322
PubMed ID:  26581175
Multidisciplinary
Abstract
New polynitrides containing metastable forms of nitrogen are actively investigated as potential high-energy-density materials. Using a structure search method based on the CALYPSO methodology, we investigated the stable stoichiometries and structures of cesium polynitrides at high pressures. Along with the CsN3, we identified five new stoichiometric compounds (Cs3N, Cs2N, CsN, CsN2 and CsN5) with interesting structures that may be experimentally synthesizable at modest pressures (i.e., less than 50 GPa). Nitrogen species in the predicted structures have various structural forms ranging from single atom (N) to highly endothermic molecules (N2, N3, N4, N5, N6) and chains (N∞). Polymeric chains of nitrogen were found in the high-pressure C2/c phase of CsN2. This structure contains a substantially high content of single N-N bonds that exceeds the previously known nitrogen chains in pure forms and also exhibit metastability at ambient conditions. We also identified a very interesting CsN crystal that contains novel N44− anion. To our best knowledge, this is the first time a charged N4 species being reported. Results of the present study suggest that it is possible to obtain energetic polynitrogens in main-group nitrides under high pressure.

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Feng P. et al. Exotic stable cesium polynitrides at high pressure // Scientific Reports. 2015. Vol. 5. No. 1. 16902
GOST all authors (up to 50) Copy
Feng P., Han Y., Liu H., Yao Y. Exotic stable cesium polynitrides at high pressure // Scientific Reports. 2015. Vol. 5. No. 1. 16902
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TY - JOUR
DO - 10.1038/srep16902
UR - https://doi.org/10.1038/srep16902
TI - Exotic stable cesium polynitrides at high pressure
T2 - Scientific Reports
AU - Feng, Peng
AU - Han, Yunxia
AU - Liu, Hanyu
AU - Yao, Yansun
PY - 2015
DA - 2015/11/19 00:00:00
PB - Springer Nature
IS - 1
VL - 5
PMID - 26581175
SN - 2045-2322
SN - 2045-2322
ER -
BibTex
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@article{2015_Feng,
author = {Peng Feng and Yunxia Han and Hanyu Liu and Yansun Yao},
title = {Exotic stable cesium polynitrides at high pressure},
journal = {Scientific Reports},
year = {2015},
volume = {5},
publisher = {Springer Nature},
month = {nov},
url = {https://doi.org/10.1038/srep16902},
number = {1},
doi = {10.1038/srep16902}
}
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