منابع مشابه
Incommensurate Crystallography
Acta Crystallographica Section A: Foundations of Crystallography covers theoretical and fundamental aspects of the structure of matter. The journal is the prime forum for research in diffraction physics and the theory of crystallographic structure determination by diffraction methods using X-rays, neutrons and electrons. The structures include periodic and aperiodic crystals, and non-periodic d...
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In condensed matter physics there are many successful models of phase transitions between a more ordered and less ordered state. Break a continuous symmetry and you’ve got yourself a cpmtomipus phase transition. Roughly speaking the transition occurs when the symmetry breaking potential term becomes the dominant one in the free energy and the system ‘contracts’ in phase space decreasing entropy...
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-The interaction between varions fluxes and the motion of incommensurate(1) modulation is treated within a phenomenological approach. Three types of fluxes are considered : the polarization current, the conductivity current and the heat flux. It is shown that in the I phase ail currents are associated with the motion of the I modulation and thus phenomena qualitatively similar to those well kno...
متن کاملIncommensurate superlattice ordering in priderite
The mineral priderite has been examined by electron microprobe analysis and electron diffraction. The composition was approximately (Ko.97Bao.aa)(FeH7 Ti6.60Mg0.23)O16, which is in line with the observed superlattice periodicity of m = 5.88, there being intergrowths of rn = 5 and m = 6 superstructures. A surprisingly high degree of lateral correlation between tunnel cations was noted. RECENTLY ...
متن کاملPressure-induced normal-incommensurate and incommensurate-commensurate phase transitions in CrOCl
The high-pressure behavior of layered CrOCl is shown to be governed by non-bonded interactions between chlorine atoms in relation to a rigid framework composed of Cr and O atoms. The competition between optimizing intra- and interlayer Cl-Cl distances and the general trend towards denser packing defines a novel mechanism for high-pressure phase transitions of inorganic materials. CrOCl possesse...
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ژورنال
عنوان ژورنال: Lateral
سال: 2021
ISSN: 2469-4053
DOI: 10.25158/l10.1.18