Atomic structure solution of the complex quasicrystal approximant Al77Rh15Ru8from electron diffraction data

Samuha, Shmuel; Mugnaioli, Enrico; Grushko, B.; Kolb, Ute; Meshi, Louisa

doi:10.1107/s2052520614022033

Cited by 14 publications

(12 citation statements)

References 29 publications

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“…To date, no quasicrystalline material has been solved using 3D ED, but this method has been successfully applied for the study of 3D periodic “approximants” of quasicrystals. 110,153…”

Section: Applications In Materials Sciencesmentioning

confidence: 99%

3D Electron Diffraction: The Nanocrystallography Revolution

et al. 2019

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Crystallography of nanocrystalline materials has witnessed a true revolution in the past 10 years, thanks to the introduction of protocols for 3D acquisition and analysis of electron diffraction data. This method provides single-crystal data of structure solution and refinement quality, allowing the atomic structure determination of those materials that remained hitherto unknown because of their limited crystallinity. Several experimental protocols exist, which share the common idea of sampling a sequence of diffraction patterns while the crystal is tilted around a noncrystallographic axis, namely, the goniometer axis of the transmission electron microscope sample stage. This Outlook reviews most important 3D electron diffraction applications for different kinds of samples and problematics, related with both materials and life sciences. Structure refinement including dynamical scattering is also briefly discussed.

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“…To date, no quasicrystalline material has been solved using 3D ED, but this method has been successfully applied for the study of 3D periodic “approximants” of quasicrystals. 110,153…”

Section: Applications In Materials Sciencesmentioning

confidence: 99%

3D Electron Diffraction: The Nanocrystallography Revolution

et al. 2019

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“…Other remarkable examples of complex structures solved on the basis of ADT data by classical direct methods were the charoite-96 polytype (spacegroup P2 1 /m, cell parameters: Rozhdestvenskaya et al 2011), the quasicrystal approximant Al 77 Rh 15 Ru 8 (spacegroup Pbma, cell parameters: a = 23.4 Å , b = 16.2 Å , c = 20.0 Å , Fig. 2b, Samuha et al 2014), and the mesoporous zeolite ITQ-43 (spacegroup Cmmm, cell parameters: a = 26.1 Å , b = 41.9 Å , c = 12.8 Å , Fig. 2c, Jiang et al 2011).…”

Section: Inorganic Phasesmentioning

confidence: 99%

Single nano crystal analysis using automated electron diffraction tomography

Mugnaioli

2014

Rend. Fis. Acc. Lincei

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Most of hitherto unknown natural phases and many new synthetic compounds can grow only in the form of nanocrystals. X-ray powder diffraction is the most widespread technique for the structural characterization of nanomaterials, but its use is limited by two main restrictions: structural information is projected in one dimension and data come from the whole sample and not from a specific single crystallite. On the other hand, crystallographic methods based on the scattering of accelerated electrons are able to obtain 3-D structural data from single volumes of few tens of nanometers. Automated diffraction tomography is a recently developed method able to record more kinematical and complete electron diffraction data. This method consists in the acquisition of a series of electron diffraction patterns while the sample is rotated around an arbitrary tilt axis by sequential mechanical steps, within the full tilt range of the microscope goniometer. Data collection can be performed on highly beam sensitive materials, as no time is required for orienting the crystal along specific crystallographic orientations and mild illumination conditions are used. In the last years many nanocrystalline materials belonging to different material classes have been characterized by automated diffraction tomography. This review describes the different experimental and analytical approaches used for the determination of inorganic and organic phases and points out the advantages offered by automated diffraction tomography for the characterization of minor phases available only in polyphasic nanomixtures and for the description of domain arrangement in polycrystalline nanocomposites.

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“…Still, it is the only technique able to deliver 3D structural data from single crystals or domains of few tens of nanometres. Nowadays, structure determination by 3D ED can be considered a standard option for inorganic compounds (Jiang et al, 2011;Samuha et al, 2014;Guo et al, 2015;Rozhdestvenskaya et al, 2017), and at least a reliable protocol for organic and metalorganic ones (Gorelik et al, 2012a;van Genderen et al, 2016;Wang et al, 2017;Gruene et al, 2018;Hynek et al, 2018;Jones et al, 2018;Portolé s-Gil et al, 2018;Yuan et al, 2018). ED has also been successfully applied to incommensurate materials (Palatinus et al, 2011;Steciuk et al, 2016), and to macromolecules (Shi et al, 2013;Yonekura et al, 2015;Clabbers et al, 2017;de la Cruz et al, 2017;Xu et al, 2018;Lanza et al, 2019) and other structures of biological relevance (Rodriguez et al, 2015;Zee et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Structure analysis of materials at the order–disorder borderline using three-dimensional electron diffraction

Mugnaioli

Gorelik

2019

Acta Crystallogr Sect B

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Diffuse scattering, observed as intensity distribution between the Bragg peaks, is associated with deviations from the average crystal structure, generally referred to as disorder. In many cases crystal defects are seen as unwanted perturbations of the periodic structure and therefore they are often ignored. Yet, when it comes to the structure analysis of nano-volumes, what electron crystallography is designed for, the significance of defects increases. Twinning and polytypic sequences are other perturbations from ideal crystal structure that are also commonly observed in nanocrystals. Here we present an overview of defect types and review some of the most prominent studies published on the analysis of defective nanocrystalline structures by means of three-dimensional electron diffraction.

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Atomic structure solution of the complex quasicrystal approximant Al₇₇Rh₁₅Ru₈from electron diffraction data

Cited by 14 publications

References 29 publications

3D Electron Diffraction: The Nanocrystallography Revolution

3D Electron Diffraction: The Nanocrystallography Revolution

Single nano crystal analysis using automated electron diffraction tomography

Structure analysis of materials at the order–disorder borderline using three-dimensional electron diffraction

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