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Screen-less oscillation photography is the method of choice for recording three-dimensional X-ray diffraction data for crystals of biological macromolecules. The geometry of an oscillation camera is extremely simple. However, the manner in which the reciprocal lattice is recorded in any...
Screen‐less oscillation photography is the method of choice for recording three‐dimensional X‐ray diffraction data for crystals of biological macromolecules. The geometry of an oscillation camera is extremely simple. However, the manner in which the reciprocal lattice is recorded in any...
The aim of this paper is to assess the potential accuracy of structure analyses based upon solution X-ray scattering experiments, before the structure problem is solved. In other words, an algorithm is sought expressing accuracy in terms of the experimental observations and associated errors,...
The convolution of the various contributions to X‐ray intensity distribution curves measured in lattice‐parameter determination leads to peak shifts and, hence, to systematic errors in the case that at least one of the contributing curves is asymmetric. For perfect crystals, depending on the...
The data given in the Abstract published in J. AppI. Cryst. (1985), 18, 542 are in error. The correct data are given below:
Crystal‐structure parameters and their associated estimated standard deviations (e.s.d.'s) have been determined for α‐Al2O3 by Rietveld analysis of Cu Kα X‐ray powder diffraction data collected on a standard diffractometer with profile step widths ranging from 0.01 to 0.32° 2θ. Estimates of the...
Scattering exponents are discussed for systems of power-law polydisperse surface and mass fractals. It is found that the scattering exponent for power-law polydisperse mass fractals lies on the interval 0, d and always depends on the mass fractal dimension. The scattering exponent for power-law...
The Voigt function is now recognized to be one of the best mathematical descriptions of the symmetrical component of the peak shape in constant‐wavelength X‐ray and neutron powder diffraction. The simpler pseudo‐Voigt function has been used previously to provide an empirical fit to observed peak...
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