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24 citations found for Aranda, M.A.

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Several fits of asymmetric synchrotron, laboratory X-ray and neutron powder profiles are presented. An excellent Rietveld refinement with high-resolution synchrotron data, [lambda] [asymptotically equal to] 0.4Å, illustrates that asymmetry due to axial divergence can be corrected efficiently.


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Acta Cryst. (2005). A61, c70
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Powder diffraction data sharing is coming. A discussion about which raw data should be shared is triggered.


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Acta Cryst. (2007). A63, s248
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Pseudo-merohedrally twinned manganite microcrystals have been studied by coherent diffraction. Several diffraction peaks were split, as expected from the twin law. Furthermore, the peaks were broken up into fringes and speckles. This method represents a new way of measuring twin domains and could allow mapping out twin and strain distributions within microcrystals.


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The structure of layered Pb(O3PC6H5) has been determined ab initio from powder diffraction data by minimizing the preferred orientation. MAS-NMR has been used to confirm the triclinic structure with two independent structural units.



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Acta Cryst. (2011). A67, C524
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The protective properties of uridine against radiation damage for small-angle X-ray scattering and macromolecular crystallography experiments at room temperature are shown. The scavenging effect of uridine is similar to, or more pronounced than, the most commonly used scavengers.

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The density and content of an amorphous component in cement pastes has been quantified by ptychography in the presence of a large amount of another different amorphous component.

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The chemical reactions and transformations accompanying clinkerization have been followed in situ by X-ray synchrotron powder diffraction at temperatures between 1200 and 1700 K. All patterns have been evaluated by the Rietveld method to obtain quantitative phase analyses.

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Clinkering reactions and processes have been established for belite sulfoaluminate cements by high-energy synchrotron powder diffraction at high temperatures.

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Amorphous phases do not diffract coherently, but from the overestimation of an appropriate crystalline standard added to the sample, the amorphous content can be measured with an accuracy close to 1%.

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The accuracy in Rietveld quantitative mineralogical analyses of artificial standard Portland cement mixtures using laboratory X-ray powder diffraction has been assessed employing high-energy synchrotron X-ray powder diffraction.

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The design, construction and commissioning of a cost-effective spinning capillary cell is reported for in situ powder X-ray diffraction for pressures up to several hundred bar. In situ recorded data have been quantitatively analyzed by the Rietveld method.

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