Structure of metastable Al–Ge phases determined from HOLZ Patterson transforms
作者:
R. Vincent,
D.R. Exelby,
期刊:
Philosophical Magazine Letters
(Taylor Available online 1991)
卷期:
Volume 63,
issue 1
页码: 31-38
ISSN:0950-0839
年代: 1991
DOI:10.1080/09500839108206598
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The utility of Patterson transforms applied to higher-order Laue zone (HOLZ) reflections in convergent-beam electron diffraction (CBED) patterns from unknown crystal structures is discussed. For HOLZ diffraction from molecular Bloch states located on subsets of atom strings, the transforms contain sharp peaks defining accurate interatomic vectors. As an example, the HOLZ Patterson transforms for two metastable Al–Ge phases are described, where the rhombohedral phase (space group R&3bar;c) is probably isostructural with Zn4Sb3and a monoclinic phase (space group P21/c) has a new polyanionic structure with tetrahedral coordination of Al by Ge.
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