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 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 |
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Pages (from-to) | 36-42 |
Number of pages | 7 |
Journal | Journal of Solid State Chemistry |
Volume | 150 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2000 |
Externally published | Yes |
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