Synthesis and crystal structure of a new niobium oxynitride, Nb2N0.88O0.12

Kohta Yamada; Hidetoshi Masuda; Nobuaki Sato; Takeo Fujino

doi:10.1006/jssc.1999.8545

Synthesis and crystal structure of a new niobium oxynitride, Nb₂N_0.88O_0.12

Kohta Yamada, Hidetoshi Masuda, Nobuaki Sato, Takeo Fujino

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

A new niobium oxynitride Nb₂N_0.88O_0.12 has been synthesized by reducing Nb₂O₅ in a stream of H₂ gas containing 0.07% N₂ at 1080°C for 5 weeks. The compound crystallizes in a hexagonal system with space group P3̄1m, and Z = 3. The lattice parameters are a = 5.2916 ± 0.0001 Å and c = 4.9987 ± 0.0001 Å. In this space group, the nitrogen/oxygen atoms statistically occupy the 1a and 2d positions, and niobium atoms occupy the 6k position. This structure is the same as that of β-Nb₂N (ε-Fe₂N type), and the compound is regarded as a solid solution of β-Nb₂N and hypothetical Nb₂O of the same crystal structure. The crystallographic parameters were refined by using the Rietveld method. The chemical bonding of this compound seems to have a significant covalent and/or metallic character in the ionic bonding. (C) 2000 Academic Press.

Original language	English
Pages (from-to)	36-42
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	150
Issue number	1
DOIs	https://doi.org/10.1006/jssc.1999.8545
Publication status	Published - 2000 Jan 1

Keywords

Crystal structure
H reduction
Niobium oxynitride
Rietveld refinement

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Yamada, K., Masuda, H., Sato, N., & Fujino, T. (2000). Synthesis and crystal structure of a new niobium oxynitride, Nb₂N_0.88O_0.12. Journal of Solid State Chemistry, 150(1), 36-42. https://doi.org/10.1006/jssc.1999.8545

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title = "Synthesis and crystal structure of a new niobium oxynitride, Nb2N0.88O0.12",

abstract = "A new niobium oxynitride Nb2N0.88O0.12 has been synthesized by reducing Nb2O5 in a stream of H2 gas containing 0.07% N2 at 1080°C for 5 weeks. The compound crystallizes in a hexagonal system with space group P{\=3}1m, and Z = 3. The lattice parameters are a = 5.2916 ± 0.0001 {\AA} and c = 4.9987 ± 0.0001 {\AA}. In this space group, the nitrogen/oxygen atoms statistically occupy the 1a and 2d positions, and niobium atoms occupy the 6k position. This structure is the same as that of β-Nb2N (ε-Fe2N type), and the compound is regarded as a solid solution of β-Nb2N and hypothetical Nb2O of the same crystal structure. The crystallographic parameters were refined by using the Rietveld method. The chemical bonding of this compound seems to have a significant covalent and/or metallic character in the ionic bonding. (C) 2000 Academic Press.",

keywords = "Crystal structure, H reduction, Niobium oxynitride, Rietveld refinement",

author = "Kohta Yamada and Hidetoshi Masuda and Nobuaki Sato and Takeo Fujino",

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AU - Yamada, Kohta

AU - Masuda, Hidetoshi

AU - Sato, Nobuaki

AU - Fujino, Takeo

PY - 2000/1/1

Y1 - 2000/1/1

N2 - A new niobium oxynitride Nb2N0.88O0.12 has been synthesized by reducing Nb2O5 in a stream of H2 gas containing 0.07% N2 at 1080°C for 5 weeks. The compound crystallizes in a hexagonal system with space group P3̄1m, and Z = 3. The lattice parameters are a = 5.2916 ± 0.0001 Å and c = 4.9987 ± 0.0001 Å. In this space group, the nitrogen/oxygen atoms statistically occupy the 1a and 2d positions, and niobium atoms occupy the 6k position. This structure is the same as that of β-Nb2N (ε-Fe2N type), and the compound is regarded as a solid solution of β-Nb2N and hypothetical Nb2O of the same crystal structure. The crystallographic parameters were refined by using the Rietveld method. The chemical bonding of this compound seems to have a significant covalent and/or metallic character in the ionic bonding. (C) 2000 Academic Press.

AB - A new niobium oxynitride Nb2N0.88O0.12 has been synthesized by reducing Nb2O5 in a stream of H2 gas containing 0.07% N2 at 1080°C for 5 weeks. The compound crystallizes in a hexagonal system with space group P3̄1m, and Z = 3. The lattice parameters are a = 5.2916 ± 0.0001 Å and c = 4.9987 ± 0.0001 Å. In this space group, the nitrogen/oxygen atoms statistically occupy the 1a and 2d positions, and niobium atoms occupy the 6k position. This structure is the same as that of β-Nb2N (ε-Fe2N type), and the compound is regarded as a solid solution of β-Nb2N and hypothetical Nb2O of the same crystal structure. The crystallographic parameters were refined by using the Rietveld method. The chemical bonding of this compound seems to have a significant covalent and/or metallic character in the ionic bonding. (C) 2000 Academic Press.

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KW - Niobium oxynitride

KW - Rietveld refinement

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