Inorganic Chemistry, volume 55, issue 15, pages 7550-7555

Stable Calcium Nitrides at Ambient and High Pressures

Shuangshuang Zhu 1
Feng Peng 2, 3
Hanyu Liu 4
高 涛 Gao Tao 1
Yansun Yao 5, 6
4
 
Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, D.C. 20015, United States
5
 
Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
6
 
Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
Publication typeJournal Article
Publication date2016-07-18
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.6
ISSN00201669, 1520510X
Inorganic Chemistry
Physical and Theoretical Chemistry
Abstract
The knowledge of stoichiometries of alkaline-earth metal nitrides, where nitrogen can exist in polynitrogen forms, is of significant interest for understanding nitrogen bonding and its applications in energy storage. For calcium nitrides, there were three known crystalline forms, CaN2, Ca2N, and Ca3N2, at ambient conditions. In the present study, we demonstrated that there are more stable forms of calcium nitrides than what is already known to exist at ambient and high pressures. Using a global structure searching method, we theoretically explored the phase diagram of CaNx and discovered a series of new compounds in this family. In particular, we found a new CaN phase that is thermodynamically stable at ambient conditions, which may be synthesized using CaN2 and Ca2N. Four other stoichiometries, namely, Ca2N3, CaN3, CaN4, and CaN5, were shown to be stable under high pressure. The predicted CaNx compounds contain a rich variety of polynitrogen forms ranging from small molecules (N2, N4, N5, and N6) to extended chains (N∞). Because of the large energy difference between the single and triple nitrogen bonds, dissociation of the CaNx crystals with polynitrogens is expected to be highly exothermic, making them as potential high-energy-density materials.

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GOST |
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GOST Copy
Zhu S. et al. Stable Calcium Nitrides at Ambient and High Pressures // Inorganic Chemistry. 2016. Vol. 55. No. 15. pp. 7550-7555.
GOST all authors (up to 50) Copy
Zhu S., Peng F., Liu H., Majumdar A., Gao Tao 高. 涛., Yao Y. Stable Calcium Nitrides at Ambient and High Pressures // Inorganic Chemistry. 2016. Vol. 55. No. 15. pp. 7550-7555.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/acs.inorgchem.6b00948
UR - https://doi.org/10.1021/acs.inorgchem.6b00948
TI - Stable Calcium Nitrides at Ambient and High Pressures
T2 - Inorganic Chemistry
AU - Zhu, Shuangshuang
AU - Peng, Feng
AU - Liu, Hanyu
AU - Majumdar, Arnab
AU - Gao Tao, 高 涛
AU - Yao, Yansun
PY - 2016
DA - 2016/07/18 00:00:00
PB - American Chemical Society (ACS)
SP - 7550-7555
IS - 15
VL - 55
SN - 0020-1669
SN - 1520-510X
ER -
BibTex |
Cite this
BibTex Copy
@article{2016_Zhu,
author = {Shuangshuang Zhu and Feng Peng and Hanyu Liu and Arnab Majumdar and 高 涛 Gao Tao and Yansun Yao},
title = {Stable Calcium Nitrides at Ambient and High Pressures},
journal = {Inorganic Chemistry},
year = {2016},
volume = {55},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021/acs.inorgchem.6b00948},
number = {15},
pages = {7550--7555},
doi = {10.1021/acs.inorgchem.6b00948}
}
MLA
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MLA Copy
Zhu, Shuangshuang, et al. “Stable Calcium Nitrides at Ambient and High Pressures.” Inorganic Chemistry, vol. 55, no. 15, Jul. 2016, pp. 7550-7555. https://doi.org/10.1021/acs.inorgchem.6b00948.
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