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Precession electron diffraction of Mn2O3 and PbMnO2.75: solving structures where X-rays fail
1MCMF, Institut Néel, CNRS and University Joseph Fourier, Grenoble, France. holger.klein@grenoble.cnrs.fr
Precession electron diffraction (PED) successfully solved crystal structures for Mn(2)O(3) and PbMnO(2.75) phases. These structures were challenging for X-ray diffraction due to phase impurity and peak overlap, highlighting PED
Area of Science:
- Crystallography
- Materials Science
- Solid State Chemistry
Background:
- X-ray diffraction (XRD) is limited for complex structures.
- MnO(2) powder samples contain Mn(2)O(3) as a minority phase.
- PbMnO(2.75) exhibits severe peak overlap in XRD patterns.
Purpose of the Study:
- To present structure solutions for Mn(2)O(3) and PbMnO(2.75) using precession electron diffraction (PED).
- To investigate parameters influencing structure solution from PED data.
Main Methods:
- Structure solution using precession electron diffraction (PED).
- Analysis of parameters: number of reflections, precession angle, resolution limit, Lorentz-type correction.
Main Results:
- Successful structure determination of Mn(2)O(3) and PbMnO(2.75) phases via PED.
- Identified the number of measured reflections as the most critical parameter for successful structure solution.
Conclusions:
- PED is a viable alternative to XRD for solving complex crystal structures.
- Optimizing data collection, particularly the number of reflections, is crucial for PED structure solution.
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