Zhao, H. ; Krysiak, Y. ; Hoffmann, K. ; Barton, B. ; Molina-Luna, Leopoldo ; Neder, R. B. ; Kleebe, Hans-Joachim ; Gesing, T. M. ; Schneider, H. ; Fischer, R. X. ; Kolb, Ute (2017)
Elucidating structural order and disorder phenomena in mullite-type Al4B2O9 by automated electron diffraction tomography.
In: Journal of Solid State Chemistry, 249
doi: 10.1016/j.jssc.2017.02.023
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The crystal structure and disorder phenomena of Al4B2O9, an aluminum borate from the mullite-type family, were studied using automated diffraction tomography (ADT), a recently established method for collection and analysis of electron diffraction data. Al4B2O9, prepared by sol-gel approach, crystallizes in the monoclinic space group C2/m. The ab initio structure determination based on three-dimensional electron diffraction data from single ordered crystals reveals that edge-connected AlO6 octahedra expanding along the b axis constitute the backbone. The ordered structure (A) was confirmed by TEM and HAADF-STEM images. Furthermore, disordered crystals with diffuse scattering along the b axis are observed. Analysis of the modulation pattern implies a mean superstructure (AAB) with a threefold b axis, where B corresponds to an A layer shifted by ½a and ½c. Diffraction patterns simulated for the AAB sequence including additional stacking disorder are in good agreement with experimental electron diffraction patterns.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Zhao, H. ; Krysiak, Y. ; Hoffmann, K. ; Barton, B. ; Molina-Luna, Leopoldo ; Neder, R. B. ; Kleebe, Hans-Joachim ; Gesing, T. M. ; Schneider, H. ; Fischer, R. X. ; Kolb, Ute |
| Art des Eintrags: | Bibliographie |
| Titel: | Elucidating structural order and disorder phenomena in mullite-type Al4B2O9 by automated electron diffraction tomography |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2017 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Solid State Chemistry |
| Jahrgang/Volume einer Zeitschrift: | 249 |
| DOI: | 10.1016/j.jssc.2017.02.023 |
| Kurzbeschreibung (Abstract): | The crystal structure and disorder phenomena of Al4B2O9, an aluminum borate from the mullite-type family, were studied using automated diffraction tomography (ADT), a recently established method for collection and analysis of electron diffraction data. Al4B2O9, prepared by sol-gel approach, crystallizes in the monoclinic space group C2/m. The ab initio structure determination based on three-dimensional electron diffraction data from single ordered crystals reveals that edge-connected AlO6 octahedra expanding along the b axis constitute the backbone. The ordered structure (A) was confirmed by TEM and HAADF-STEM images. Furthermore, disordered crystals with diffuse scattering along the b axis are observed. Analysis of the modulation pattern implies a mean superstructure (AAB) with a threefold b axis, where B corresponds to an A layer shifted by ½a and ½c. Diffraction patterns simulated for the AAB sequence including additional stacking disorder are in good agreement with experimental electron diffraction patterns. |
| Freie Schlagworte: | Electron diffraction, Aluminum borate, Crystal structure determination, Superstructure, Disorder |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie |
| Hinterlegungsdatum: | 06 Dez 2018 10:19 |
| Letzte Änderung: | 18 Aug 2021 11:41 |
| PPN: | |
| Sponsoren: | Haishuang Zhao gratefully acknowledges the financial support from the Carl-Zeiss-Stiftung., Yaşar Krysiak is grateful for the financial support by the Stipendienstiftung Rheinland-Pfalz., Thorsten M. Gesing and Reinhard X. Fischer gratefully thank the Deutsche Forschungsgemeinschaft for the financial support (GE1981/5-1 and FI442/19-1)., The JEM-ARM200F was partially funded by the Deutsche Forschungsgemeinschaft (DFG/INST163/2951). |
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