نتایج جستجو برای: x ray diffraction ordering
تعداد نتایج: 719244 فیلتر نتایج به سال:
Here we show that the low temperature phase of magnetite is associated with an effective, although fractional, ordering of the charge. Evidence and a quantitative evaluation of the atomic charges are achieved by using resonant x-ray diffraction (RXD) experiments whose results are further analyzed with the help of ab initio calculations of the scattering factors involved. By confirming the resul...
clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...
The study of the Verwey transition in magnetite has been a matter of intense study during the last years [1,2]. The mechanism proposed by Verwey [3] was the charge localization and ordering of the electrons at the iron octahedral sites giving rise to an ordered sequence of Fe3þ and Fe2þ ions. Recent x-ray diffraction and resonant x-ray scattering at the iron K edge have strongly modified this d...
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