Atomic structure analysis of nanocrystalline Boehmite AlO(OH)
| dc.creator | Bruehne, Stefan | |
| dc.creator | Gottlieb, Saskia | |
| dc.creator | Assmus, Wolf | |
| dc.creator | Alig, Edith | |
| dc.creator | Schmidt, Martin U. | |
| dc.date | 2007-08-28 | |
| dc.date.accessioned | 2026-07-07T09:34:10Z | |
| dc.date.available | 2026-07-07T09:34:10Z | |
| dc.description | Nanocrystalline n-AlO(OH) (Disperal P2(R) of Sasol) was investigated by means of the atomic pair distribution function (PDF). The PDF is derived from powder diffraction data, an ideally resolved PDF is obtained from a synchrotron source which provides a large maximal scattering vector length Qmax > 300 nm-1. Here, however, we were able to reveal atomic structure details of the about 4 nm particles from in-house diffraction data (Qmax = 130 nm-1): PDF least squares model refinements show that n-AlO(OH) is of the layered Boehmite structure type (oC16, Cmcm). But the structure is uniformly distorted in domains of ca. 2 nm size within the nano particles. The hydrogen bonds between the layers are widened up significantly by +13 pm, accounting for the higher reactivity when compared to microcrystalline Boehmite. Our results from only one "nanocrystallographic" experiment are consistent with a trend which was found via the Rietveld technique on a series of AlO(OH) of different crystallite size (Bokhimi et al., 2001). In addition, the PDF contains information on structural distortion as a function of (coherence) domain size within the nano particles. | |
| dc.identifier | https://arxiv.org/abs/0708.3771 | |
| dc.identifier | http://arxiv.org/abs/0708.3771 | |
| dc.identifier | Crystal Growth&Design 8(2) (2008) 489-493 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/159391 | |
| dc.subject | Materials Science | |
| dc.title | Atomic structure analysis of nanocrystalline Boehmite AlO(OH) | |
| dc.type | text |