Results 111 to 120 of about 5,852 (136)

Une étude cristallographique: superspace description of a commensurate composite cocrystal of 4,4′-dinitrobiphenyl and biphenyl

CrystEngComm, 2022
The structure of a 4,4′-dinitrobiphenyl and biphenyl 3 : 1 composite cocrystal is presented in (3 + 1)D superspace.
Toms Rekis, Sitaram Ramakrishnan, Surya Rohith Kotla, Jin-Ke Bao, Claudio Eisele, Andreas Schönleber, Leila Noohinejad, Carsten Paulmann, Martin Tolkiehn, Sander van Smaalen   +9 more
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A superspace-group description of the commensurately modulated structure of TaTe₄

Acta Crystallographica Section B Structural Science, 1989
A superspace-group description of the commensurately modulated structure of TaTe4 is given on the basis of X-ray data reported by Bronsema, van Smaalen, de Boer, Wiegers, Jellinek & Mahy [Acta Cryst. (1987), B43, 305-313]. The structural model, given in that work, easily explains in the present approach all the observed extinction rules, including ...
A. Budkowski, A. Prodan, V. Marinković, D. Kucharczyk, I. Uszyński, F. W. Boswell   +5 more
openaire   +1 more source

The (3 + 1)-dimensional superspace description of the commensurately modulated structure of p-chlorobenzamide (α-form) and its relation to the γ-form

Zeitschrift für Kristallographie - Crystalline Materials, 2003
Abstract The room temperature structure (α-form) of the organic compound p-chlorobenzamide, C7H6ClNO, can be described as a classical three-dimensional periodic superstructure (α S) and also as a commensurately modulated structure (α M) in (3 + 1)-dimensional superspace.
A. Schönleber, P. Pattison, G. Chapuis
openaire   +1 more source

Incommensurate versus Commensurate Description of the A_xBX₃ Hexagonal Perovskite-Type Structure. Sr_1.2872NiO₃ Incommensurate Composite Compound Example

Chemistry of Materials, 1998
We report a new structure determination of the Sr1.2872NiO3 incommensurate composite hexagonal perovskite compound. Three different refinement strategies are presented:  (i) a 3D supercell approximation with a nonharmonic development of the atomic displacement factor, (ii) an original (3+1)D incommensurate composite description with the use of crenel ...
M. Evain, F. Boucher, O. Gourdon, V. Petricek, M. Dusek, P. Bezdicka   +5 more
openaire   +1 more source

Superspace-group description of short-period commensurately modulated crystals

Acta Crystallographica Section A Foundations of Crystallography, 1987
The symmetry of superstructures is described by an ordinary three-dimensional space group, based on a unit cell which is a multiple of the basic structure unit cell. Alternatively, superstructures can be looked upon as commensurately modulated structures. Then, the structure is described by its basic structure plus some distortion wave.
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Landau Model of the Phase Transitions for Description of Commensurate Polar Smectic Structures

Ferroelectrics, 2012
Calculations of polar structures with frustration interaction are often difficult and require complicated numerical calculations. A simple approach based on Landau model is given to describe the manifold of commensurate structures. The power of the used method is shown on the example of polar liquid crystals.
openaire   +1 more source

Commensurability between Element Symmetry and the Number of Skyrmions Governing Skyrmion Diffusion in Confined Geometries

Advanced Functional Materials, 2021
Nico Kerber, Klaus Raab, Boris Seng
exaly  

Generalised commensurability properties of efficiency measures: Implications for productivity indicators

European Journal of Operational Research, 2022
Kristiaan Hj Kerstens
exaly  

Recent progress in Lynch syndrome and other familial colorectal cancer syndromes

Ca-A Cancer Journal for Clinicians, 2018
Patrick M Boland, Clement Richard Boland, Matthew B Yurgelun   +2 more
exaly  

Heat-to-Connect: Surface Commensurability Directs Organometallic One-Dimensional Self-Assembly

ACS Nano, 2011
Felix Hanke, Mats O Persson
exaly