Open AccessJournal Article
The Rietveld method
TLDR
In this paper, the early days of the Rietveld method are described, along with a retrospective view of its application in various areas of physics, such as X-ray and neutron analysis.Abstract:
Introduction to the Rietveld Method 1. The early days: a retrospective view 2. Mathematical aspects of Rietveld refinement 3. The flow of radiation in a polycrystalline material 4. Data collection strategies: fitting the experiment to the need 5. Background modelling in Rietveld analysis 6. Analytical profile fitting of X-ray powder diffraction profiles in Rietveld analysis 7. Crystal imperfection broadening and peak shape in the Rietveld method 8. Bragg reflection profile shape in X-ray powder diffraction patterns 9. Restraints and constraints in Rietveld refinement 10. Rietveld refinement with time-of-flight powder diffraction data from pulsed neutron sources 11. Combined X-ray and neutron Rietveld refinement 12. Rietveld analysis programs Rietan and Premos and special applications 13. Position - constrained and unconstrained powder-pattern-decomposition methods 14. Ab initio structure solutions with powder diffraction dataread more
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Characterisation and Development of Nanostructured, Ultrahigh Strength, and Ductile Bainitic Steels
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Reversible hydriding and dehydriding properties of CaSi: Potential of metal silicides for hydrogen storage
Abstract: We found that CaSi reversibly absorbs and desorbs hydrogen. First-principles calculations theoretically indicated that CaSi hydride is thermodynamically stable. The hydriding and dehydriding properties of CaSi were experimentally determined using pressure-composition (p‐c) isotherms and x-ray diffraction analysis. The p‐c isotherms clearly demonstrated plateau pressures in a temperature range of 473–573K. The maximum hydrogen content was 1.9wt% under a hydrogen pressure of 9MPa at 473K. The reversible hydriding and dehydriding properties of CaSi suggest the potential of metal silicides for hydrogen storage.