In this paper the method of parametric Rietveld refinement is described, in which an ensemble of diffraction data collected as a function of time, temperature, pressure or any other variable are fitted to a single evolving structural model. Parametric refinement offers a number of potential benefits over independent or sequential analysis. It can lead to higher precision of refined parameters, ...

This paper aims to analyze the structure of Ti-25Ta-xZr system alloys (x = 0, 10, 20, 30, and 40% wt.) after melting hot-rolling by Rietveld's technique. The results confirm that zirconium acts as a β phase stabilizer (in which Ti-25Ta-40Zr alloy is fully in as-cast condition), increases lattice parameters phases, decreases c/a ratio α phase, consequently, elastic modulus values (86 72GPa) atom...

The typical initial reaction to the suggestion that Rietveld analysis be used for industrial problem solving is “Isn’t that overkill?“. The advent of fast computers (especially PCs) overturns this perception, and makes this exciting analytical tool practical for even routine applications. Rietveld analysis provides a convenient and physically-meaningful way of extracting the maximum possible in...

Since its inception over 35 years ago, Rietveld refinement (Rietveld, 1969) has come a long way. In the beginning, the aim was to carry out crystal-structure refinement using neutron diffraction. As its primary purpose was refinement of the perfect crystal structures of polycrystalline samples, there was a need to introduce corrections to peak intensities and positions, as calculated for a perf...

A nearly single-phase of a low-temperature (LT) phase of Li(2)FeSiO(4) is prepared by a hydrothermal method at 150 °C. We report the detailed crystal structure of LT-Li(2)FeSiO(4) (S.G. Pmn2(1)) by applying Rietveld/MEM analysis to the synchrotron XRD pattern. LT-Li(2)FeSiO(4) shows 150 mA h g(-1) as the positive electrode materials of rechargeable batteries.