Forthcoming article in Acta Crystallographica Section A Foundations and Advances
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Acta Crystallographica Section A: Foundations and Advances 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 disordered materials, and the corresponding Bragg, satellite and diffuse scattering, thermal motion and symmetry aspects. Spatial resolutions range from the subatomic domain in charge-density studies to nanodimensional imperfections such as dislocations and twin walls. The chemistry encompasses metals, alloys, and inorganic, organic and biological materials. Structure prediction and properties such as the theory of phase transformations are also covered.en-gbCopyright (c) 2015 International Union of CrystallographyInternational Union of CrystallographyInternational Union of Crystallographyhttp://journals.iucr.orgurn:issn:0108-7673Acta Crystallographica Section A: Foundations and Advances 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 disordered materials, and the corresponding Bragg, satellite and diffuse scattering, thermal motion and symmetry aspects. Spatial resolutions range from the subatomic domain in charge-density studies to nanodimensional imperfections such as dislocations and twin walls. The chemistry encompasses metals, alloys, and inorganic, organic and biological materials. Structure prediction and properties such as the theory of phase transformations are also covered.text/htmlActa Crystallographica Section A Foundations and Advancestextdaily12002-01-01T00:00+00:00med@iucr.orgActa Crystallographica Section A Foundations and AdvancesCopyright (c) 2015 International Union of Crystallographyurn:issn:0108-7673Forthcoming article in Acta Crystallographica Section A Foundations and Advanceshttp://journals.iucr.org/logos/rss10a.gif
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Still imageEighteenth-century forms of quasicrystals
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This contribution analyses the symmetry of some crystal models published in 1783 by Romé de L'Isle. Our analysis shows that such models have the external symmetry of quasicrystals.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Pina and López-Acevedodoi:10.1107/S2053273315021865International Union of CrystallographyThis contribution analyses the symmetry of some crystal models published in 1783 by Romé de L'Isle. Our analysis shows that such models have the external symmetry of quasicrystals.enQUASICRYSTALS; CRYSTALLOGRAPHIC MODELS; ROME DE L'ISLE; SYMMETRY ANALYSIS; QUASICRYSTALS; CRYSTALLOGRAPHY MODELS; ROME DE L'ISLE; SYMMETRY ANALYSISThis contribution analyses the symmetry of some crystal models published in 1783 by Romé de L'Isle. Our analysis shows that such models have the external symmetry of quasicrystals.text/htmlEighteenth-century forms of quasicrystals textX-Ray Crystallography. By Gregory S. Girolami. University Science Books, 2015. Pp. 500. Price (hardcover) USD 88.00. ISBN 978-1-891389-77-1.
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Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Massimo Nespolodoi:10.1107/S2053273315020331International Union of CrystallographyenBOOK REVIEW; X-RAY CRYSTALLOGRAPHYtext/htmlX-Ray Crystallography. By Gregory S. Girolami. University Science Books, 2015. Pp. 500. Price (hardcover) USD 88.00. ISBN 978-1-891389-77-1. textStructure of ordered coaxial and scroll nanotubes: general approach
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The structure of ordered multiwalled coaxial and cylindrical scroll nanotubes is described on the basis of a primitive oblique cell and a cylindrical lattice. Coordinates of the atoms in the nanotube are achieved by the transfer of its bulk analogue structure onto a cylindrical surface with a circular or spiral cross section.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Zufar Khalitov et al.doi:10.1107/S2053273315019440International Union of CrystallographyThe structure of ordered multiwalled coaxial and cylindrical scroll nanotubes is described on the basis of a primitive oblique cell and a cylindrical lattice. Coordinates of the atoms in the nanotube are achieved by the transfer of its bulk analogue structure onto a cylindrical surface with a circular or spiral cross section.enMULTIWALLED NANOTUBE; CHIRAL NANOTUBE; SCROLL NANOTUBE; CHIRAL INDEXESThe structure of ordered multiwalled coaxial and cylindrical scroll nanotubes is described on the basis of a primitive oblique cell and a cylindrical lattice. Coordinates of the atoms in the nanotube are achieved by the transfer of its bulk analogue structure onto a cylindrical surface with a circular or spiral cross section.text/htmlStructure of ordered coaxial and scroll nanotubes: general approachtextWhat is an `ideally imperfect' crystal? Is kinematical theory appropriate?
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This paper describes the diffraction from imperfect crystals and the applicability of kinematical theory.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Paul F. Fewsterdoi:10.1107/S2053273315018975International Union of CrystallographyThis paper describes the diffraction from imperfect crystals and the applicability of kinematical theory.enIMPERFECT CRYSTALS; KINEMATICAL THEORY; DYNAMICAL THEORYThis paper describes the diffraction from imperfect crystals and the applicability of kinematical theory.text/htmlWhat is an `ideally imperfect' crystal? Is kinematical theory appropriate?textFoundations of Crystallography with Computer Applications. Second edition. By Maureen Julian. CRC Press, 2015. Pp. 680. Price USD 84.96 (book and e-book), USD 69.97 (e-book). ISBN 978-1-4665-5291-3.
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Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Ulrich Müllerdoi:10.1107/S205327331501877XInternational Union of CrystallographyenBOOK REVIEW; CRYSTALLOGRAPHY; COMPUTER APPLICATIONStext/htmlFoundations of Crystallography with Computer Applications. Second edition. By Maureen Julian. CRC Press, 2015. Pp. 680. Price USD 84.96 (book and e-book), USD 69.97 (e-book). ISBN 978-1-4665-5291-3.textSynchrotron powder diffraction of silicon: high-quality structure factors and electron density
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High-quality, high-resolution structure factors are obtained for silicon by synchrotron powder X-ray diffraction, where the estimated uncertainties are assessed based on sampling statistics contrary to the commonly used counting statistics. The quality and resolution of the data set enable an explicit modelling of both the valence and inner electron density.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Nanna Wahlberg et al.doi:10.1107/S2053273315018318International Union of CrystallographyHigh-quality, high-resolution structure factors are obtained for silicon by synchrotron powder X-ray diffraction, where the estimated uncertainties are assessed based on sampling statistics contrary to the commonly used counting statistics. The quality and resolution of the data set enable an explicit modelling of both the valence and inner electron density.enSYNCHROTRON POWDER X-RAY DIFFRACTION; CHARGE DENSITY; CORE POLARIZATION; STRUCTURE FACTORS; SILICONHigh-quality, high-resolution structure factors are obtained for silicon by synchrotron powder X-ray diffraction, where the estimated uncertainties are assessed based on sampling statistics contrary to the commonly used counting statistics. The quality and resolution of the data set enable an explicit modelling of both the valence and inner electron density.text/htmlSynchrotron powder diffraction of silicon: high-quality structure factors and electron densitytextMerohedral twins revisited: quinary twins and beyond
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The generalization of lattice invariance in merohedral twins to {\bb Z}-module invariance is discussed.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Marianne Quiquandon et al.doi:10.1107/S2053273315018197International Union of CrystallographyThe generalization of lattice invariance in merohedral twins to {\bb Z}-module invariance is discussed.enMEROHEDRAL TWINS; QUINARY TWINS; DURER STRUCTURE; POLYGONAL TILINGSThe generalization of lattice invariance in merohedral twins to {\bb Z}-module invariance is discussed.text/htmlMerohedral twins revisited: quinary twins and beyondtextComputation in electron microscopy
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The numerical computation of high-resolution transmission electron micrographs from first principles and its inverse are surveyed.Copyright (c) 2015 International Union of Crystallographyurn:issn:2053-2733Earl J. Kirklanddoi:10.1107/S205327331501757XInternational Union of CrystallographyThe numerical computation of high-resolution transmission electron micrographs from first principles and its inverse are surveyed.enHIGH-RESOLUTION TRANSMISSION ELECTRON MICROSCOPY; HRTEM; MULTISLICE METHOD; EXIT-WAVE RECONSTRUCTION; DECONVOLUTIONThe numerical computation of high-resolution transmission electron micrographs from first principles and its inverse are surveyed.text/htmlComputation in electron microscopytext