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Conference on Lasers and Electro-Optics 2010, 2010
Transient electronic charge density maps with 30 picometer spatial and 100 femtosecond temporal resolution gained from x-ray powder diffraction experiments unravel for the first time a concerted electron and proton transfer in hydrogen-bonded (NH 4 ) 2 SO 4 crystals.
Flavio Zamponi +4 more
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Accuracy in Quantitative X-ray Powder Diffraction Analyses

Advances in X-ray Analysis, 1994
Abstract Accuracy, or how well a measurement conforms to the true value of a parameter, is important in XRD analyses in three primary areas, 1) 26 position or d-spacing; 2) peak shape; and 3) intensity. Instrumental factors affecting accuracy include zero-point, axial-divergence, and specimen- displacement errors, step size, and even ...
David L. Bish, Steve J. Chipera
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X-Ray Powder Diffraction

2019
X-ray powder diffraction (XRPD) techniques are used to characterize samples in the form of loose powders, aggregates of finely divided material or polycrystalline specimens. This article provides a detailed account of XRPD. It begins with a discussion on XRPD instrumentation and the techniques used to characterize samples.
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Synchrotron X-Ray Powder Diffraction

MRS Bulletin, 1987
X-ray powder diffraction is one of the most widely used techniques by scientists engaged in the synthesis, analysis, and characterization of solids. It is estimated that there are now about 25,000 users throughout the world, of which about one third are in the United States.
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X-Ray Powder Diffraction Patterns As Random Fractals

Advances in X-ray Analysis, 1995
The concept of fractals (or fractional dimensions), although known earlier, was formalized theoretically and given that name in 1967 by Mandelbrot. A fractal is some object, whether mathematically constructed or observed in the physical world, that exhibits scale in variance—that is, it looks essentially the same at all scales, or over some range of ...
Dana T. Griffen, Kim R. Sullivan
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X-ray powder diffraction data for nine analgesics

Talanta, 1991
X-Ray powder diffraction data for nine analgesics have been obtained by using a powder diffractometer. The results obtained by using the McCreery and Byström-Asklund methods of sample loading were averaged and tabulated in terms of the lattice spacings and the relative line intensities.
J E, Kountourellis +3 more
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Diffraction and the X-Ray Powder Diffractometer

2001
Materials are made of atoms. Knowledge of how atoms are arranged into crystal structures and microstructures is the foundation on which we build our understanding of the synthesis, structure and properties of materials. There are many ways for measuring chemical compositions of materials, and methods based on inner-shell electron spectroscopies are ...
Brent Fultz, James M. Howe
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X-Ray Powder Diffraction (XRPD)

2016
X-ray powder diffraction (XRPD) is an important tool to determine the phase composition of archaeological ceramics. In principle, a thin beam of X-rays incident to a lattice plane of crystalline matter is scattered in specific directions and angles depending on the distances of atoms. This allows determination of characteristic unit cell dimensions and
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Synchrotron X-Ray Powder Diffraction

2012
The large breadth of the Synchrotron Radiation X-ray Powder Diffraction (SR-XRPD) technique inevitably requires that we make a certain number of choices in its discussion. Assuming you already have some knowledge of SR and XRPD, we explore the peculiar features that arise from combining them.
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X-Ray Powder Diffraction

2021
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x-ray diffraction
crystal structure
synthesis