Huppertz, Hubert ; Hering, Stefanie A. ; Zvoriste, Carmen E. ; Lauterbach, Stefan ; Oeckler, Oliver ; Riedel, Ralf ; Kinski, Isabel (2009)
High-Pressure Synthesis, Electron Energy-Loss Spectroscopy Investigations, and Single Crystal Structure Determination of a Spinel-Type Gallium Oxonitride Ga2.79◻0.21(O3.05N0.76◻0.19).
In: Chemistry of Materials, 21 (10)
doi: 10.1021/cm803371k
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Under high-pressure/high-temperature conditions of 5 GPa and 1250 °C, the cubic phase Ga2.790.21(O3.05N0.760.19) ( = vacancy) was synthesized in a Walker-type multianvil apparatus. For the first time, the crystal structure of a gallium oxonitride was determined on the basis of single crystal X-ray diffraction data. The cubic spinel-type gallium oxonitride crystallizes in the space group Fd3̅m (No. 227) with a lattice parameter a0 = 827.8(2) pm. The combination of energy-dispersive X-ray spectroscopy (EDS) with electron energy-loss spectroscopy (EELS) allowed the quantification of nitrogen and oxygen for structural refinement. In the literature dealing with oxonitrides, crystal defects in spinel-type materials are handled with different models, mainly the approximation of a constant anion model. The present results indicate that this model is questionable, and one should also take into account a model with both cation and anion vacancies. Furthermore, a linear relationship between the lattice parameters and the ratio N/O in the gallium oxonitrides is questionable.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Huppertz, Hubert ; Hering, Stefanie A. ; Zvoriste, Carmen E. ; Lauterbach, Stefan ; Oeckler, Oliver ; Riedel, Ralf ; Kinski, Isabel |
| Art des Eintrags: | Bibliographie |
| Titel: | High-Pressure Synthesis, Electron Energy-Loss Spectroscopy Investigations, and Single Crystal Structure Determination of a Spinel-Type Gallium Oxonitride Ga2.79◻0.21(O3.05N0.76◻0.19) |
| Sprache: | Englisch |
| Publikationsjahr: | 2009 |
| Verlag: | ACS |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Chemistry of Materials |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1021/cm803371k |
| Kurzbeschreibung (Abstract): | Under high-pressure/high-temperature conditions of 5 GPa and 1250 °C, the cubic phase Ga2.790.21(O3.05N0.760.19) ( = vacancy) was synthesized in a Walker-type multianvil apparatus. For the first time, the crystal structure of a gallium oxonitride was determined on the basis of single crystal X-ray diffraction data. The cubic spinel-type gallium oxonitride crystallizes in the space group Fd3̅m (No. 227) with a lattice parameter a0 = 827.8(2) pm. The combination of energy-dispersive X-ray spectroscopy (EDS) with electron energy-loss spectroscopy (EELS) allowed the quantification of nitrogen and oxygen for structural refinement. In the literature dealing with oxonitrides, crystal defects in spinel-type materials are handled with different models, mainly the approximation of a constant anion model. The present results indicate that this model is questionable, and one should also take into account a model with both cation and anion vacancies. Furthermore, a linear relationship between the lattice parameters and the ratio N/O in the gallium oxonitrides is questionable. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 12 Apr 2012 09:20 |
| Letzte Änderung: | 05 Mär 2013 10:00 |
| PPN: | |
| Sponsoren: | This work was financially supported by the Deutsche Forschungsgemeinschaft HU 966/5-1 and KI 838/3-1., H. Huppertz and R. Riedel are indebted to the Fonds der Chemischen Industrie for financial support. |
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