نتایج جستجو برای: rietveld
تعداد نتایج: 1392 فیلتر نتایج به سال:
Taller individuals typically have occupations with higher social status and higher earnings than shorter individuals. Further, entrepreneurship is associated with high social status in numerous countries; hence, entrepreneurs might be taller than wage workers. Using data from the German Socio-Economic Panel (2002-2010), we find that a 1 cm increase in an individual’s height raises the probabili...
Stimulating Good Practice: What an EEC Approach Could Actually Mean for DBS Practice Sanneke de Haan, Erik Rietveld & Damiaan Denys a Academic Medical Centre, University of Amsterdam b Institute for Logic, Language and Computation, University of Amsterdam and Academic Medical Centre, University of Amsterdam c The Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Scie...
Polycrystalline silver(I) deca-calcium heptakis(orthophos-phate), AgCa10(PO4)7, was obtained by solid-state reaction. It is isotopic with members of the series MCa10(PO4)7 (M = Li, Na, K and Cs), and is closely related to the structure of β-Ca3(PO4)2. The crystal structure of the title compound is built up from a framework of [CaO9] and two [CaO8] polyhedra, one [CaO6] octa-hedron (site symmetr...
Reference x-ray powder patterns and the crystal structures of the lanthanide com-determined by the x-ray Rietveld refinement technique. A structural trend was confirmed for this series of compounds. The compounds with smaller ionic radii are isostructural to the orthorhombic " green phase " (BaY2CuO5). The lattice parameters for compounds with R = Tm to Sm range from R is seven-fold coordinated...
Introduction: Imaging spectroscopy is one of the most powerful methods to characterize the surface of Mars, either from orbit or in situ using rovers. These observations have shown that iron chemistry and mineralogy dominates most of the surface processes. We have described in [1] a laboratory experiment in which elemental iron particles have been exposed to weathering in a simulated (CO 2 + H ...
We have prepared crystallographically ordered and disorder specimens of the double perovskite, Sr2FeMoO6 and investigated their magnetoresistance behaviour. The extent of ordering between the Fe and Mo sites in the two samples is determined by Rietveld analysis of powder x-ray diffraction patterns and reconfirmed by Mössbauer studies. While the ordered sample exhibits the sharp low-field respon...
The compound BaGaF5•2H2O was prepared at moderate temperature, 60-80°C, from HF aqueous solution. It crystallizes in the monoclinic system, space group P21/m with a = 10.0626(6) Å, b = 5.8070(1) Å, c = 4.9788(3) Å, β = 103.359(7)° and Z = 2. The structure was determined from conventional powder diffraction data by direct methods and refined from synchrotron data to RP = 10.8 and RB = 4.0 % by...
Turbostratic disorder, consisting in a disorder in which different layers have different rotations with respect to an axis, is commonly found in montmorillonite. The effect of this kind of disorder on diffraction profiles is significant and must be taken into account, especially in quantitative phase analysis. The effect of the turbostratic disorder in textured materials has never been investig...
The crystal structure of Eu(2+)-activated Sr(8)ZnSc(PO(4))(7):Eu(2+) phosphor was refined and determined from XRD profiles by the Rietveld refinement method using a synchrotron light source. This phosphor crystallizes in the monoclinic structure with the I2/a space group. The SZSP:xEu(2+) phosphors showed a broad yellow emission band centered at 511 and 571 nm depending on the concentration of ...
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