1
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Grey IE. Diffraction methods in the characterization of new mineral species. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Steciuk G, Kiefer B, Hornfeck W, Kasatkin AV, Plášil J. Molybdenum Disorder in Hydrated Sedovite, Ideally U(MoO 4) 2· nH 2O, a Microporous Nanocrystalline Mineral Characterized by Three-Dimensional Electron Diffraction, Density Functional Theory Computations, and Complexity Analysis. Inorg Chem 2021; 60:15169-15179. [PMID: 34559506 DOI: 10.1021/acs.inorgchem.1c01506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sedovite, U4+(Mo6+O4)2·nH2O, is reported as being one of the earliest supergene minerals formed of the secondary zone. The difficulty of isolating enough pure material limits studies to techniques that can access the nanoscale combined with theoretical analyses. The crystal structure of sedovite has been solved and refined using the dynamical approach from three-dimensional electron diffraction data collected on natural nanocrystals found among iriginite. At 100 K, sedovite is monoclinic a ≈ 6.96 Å, b ≈ 9.07 Å, c ≈ 12.27 Å, and V ≈ 775 Å3 with space group C2/c. The microporous structure presents a characteristic framework built from uranium polyhedra and disordered Mo pyramids creating pore hosting water molecules. To confirm the formula U4+(Mo6+O4)2·nH2O, the possible presence of a hydroxyl group that would promote Mo5+ was tested with density functional theory (DFT) computations at the ambient temperature. DFT predicts that sedovite is a ferromagnetic insulator with a fundamental bandgap of Eg ∼ 1.7 eV with its chemical and physical properties dominated by U4+ rather than Mo6+. The structural complexity, IG,tot, of sedovite was evaluated in order to get indirect information about the missing formation conditions.
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Affiliation(s)
- Gwladys Steciuk
- Department of Structure Analysis, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, Prague 8 182 21, Czech Republic
| | - Boris Kiefer
- Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Wolfgang Hornfeck
- Department of Structure Analysis, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, Prague 8 182 21, Czech Republic
| | - Anatoly V Kasatkin
- Fersman Mineralogical Museum of Russian Academy of Sciences, Leninsky Prospekt 18-2, 119071 Moscow, Russia
| | - Jakub Plášil
- Department of Structure Analysis, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, Prague 8 182 21, Czech Republic
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3
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Geng L, Meng CY, Lu HY. Hydrogen-Bond-Assisted Alignment of [MCu(SeO 3) 4Cl(H 2O)] 4- (M = Fe, Ga) Anionic Layers to Form Two Polar Oxychlorides: Pb 2MCu(SeO 3) 4Cl(H 2O). Inorg Chem 2021; 60:831-839. [PMID: 33378193 DOI: 10.1021/acs.inorgchem.0c02868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two novel selenite oxychlorides Pb2MCu(SeO3)4Cl(H2O) (M = Fe, Ga) were hydrothermally synthesized and structurally characterized. They are isostructural and crystallize in the two-dimensional [MCu(SeO3)4Cl(H2O)]4- anionic layer structure mediated with hydrogen bonds and aligned between neighboring layers which assist in building the three-dimensional framework with a polar space group. Optical properties measurements revealed that the optical band gaps are 2.61 and 3.22 eV for Pb2FeCu(SeO3)4Cl(H2O) (1) and Pb2GaCu(SeO3)4Cl(H2O) (2) and the SHG responses are about 0.12 and 0.18 times that of KDP, respectively. Furthermore, 1 exhibits an interesting metamagnetic phenomenon under varied applied fields from around 1 to 4 T at 2 K, and 2 behaves with potential ferromagnetic ordering at low temperature.
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Affiliation(s)
- Lei Geng
- College of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
| | - Chang-Yu Meng
- Guangxi Key Laboratory of Agricultural Resources, Chemistry, and Biotechnology, Department of Chemistry and Food Science, Yulin Normal University, Yulin 537000, China
| | - Hong-Yan Lu
- College of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
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4
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Woollam GR, Das PP, Mugnaioli E, Andrusenko I, Galanis AS, van de Streek J, Nicolopoulos S, Gemmi M, Wagner T. Structural analysis of metastable pharmaceutical loratadine form II, by 3D electron diffraction and DFT+D energy minimisation. CrystEngComm 2020. [DOI: 10.1039/d0ce01216e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Coupling 3D electron diffraction and density functional theory provided the metastable pharmaceutical crystal structure within nanometre range, under ambient conditions.
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Affiliation(s)
| | | | - Enrico Mugnaioli
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
- 56127 Pisa
- Italy
| | - Iryna Andrusenko
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
- 56127 Pisa
- Italy
| | | | | | | | - Mauro Gemmi
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
- 56127 Pisa
- Italy
| | - Trixie Wagner
- Novartis Institutes for BioMedical Research
- Basel 4002
- Switzerland
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5
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Gemmi M, Mugnaioli E, Gorelik TE, Kolb U, Palatinus L, Boullay P, Hovmöller S, Abrahams JP. 3D Electron Diffraction: The Nanocrystallography Revolution. ACS CENTRAL SCIENCE 2019; 5:1315-1329. [PMID: 31482114 PMCID: PMC6716134 DOI: 10.1021/acscentsci.9b00394] [Citation(s) in RCA: 200] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Indexed: 05/20/2023]
Abstract
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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Affiliation(s)
- Mauro Gemmi
- Center
for Nanotechnology Innovation@NEST, Istituto
Italiano di Tecnologia, Piazza S. Silvestro 12, 56127 Pisa, Italy
| | - Enrico Mugnaioli
- Center
for Nanotechnology Innovation@NEST, Istituto
Italiano di Tecnologia, Piazza S. Silvestro 12, 56127 Pisa, Italy
| | - Tatiana E. Gorelik
- University
of Ulm, Central Facility for Electron Microscopy, Electron Microscopy
Group of Materials Science (EMMS), Albert Einstein Allee 11, 89081 Ulm, Germany
| | - Ute Kolb
- Institut
für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
- Institut
für Angewandte Geowissenschaften, Technische Universität Darmstadt, Schnittspahnstraße 9, 64287 Darmstadt, Germany
| | - Lukas Palatinus
- Department
of Structure Analysis, Institute of Physics
of the CAS, Na Slovance 2, 182 21 Prague 8, Czechia
| | - Philippe Boullay
- CRISMAT,
Normandie Université, ENSICAEN, UNICAEN, CNRS UMR 6508, 6 Bd Maréchal Juin, F-14050 Cedex Caen, France
| | - Sven Hovmöller
- Inorganic
and Structural Chemistry, Department of Materials and Environmental
Chemistry, Stockholm University, 106 91 Stockholm, Sweden
| | - Jan Pieter Abrahams
- Center
for Cellular Imaging and NanoAnalytics (C−CINA), Biozentrum, Basel University, Mattenstrasse 26, CH-4058 Basel, Switzerland
- Department
of Biology and Chemistry, Paul Scherrer
Institut (PSI), CH-5232 Villigen PSI, Switzerland
- Leiden
Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
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6
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Kolb U, Krysiak Y, Plana-Ruiz S. Automated electron diffraction tomography - development and applications. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2019; 75:463-474. [PMID: 32830704 PMCID: PMC6690130 DOI: 10.1107/s2052520619006711] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 05/10/2019] [Indexed: 06/10/2023]
Abstract
Electron diffraction tomography (EDT) has gained increasing interest, starting with the development of automated electron diffraction tomography (ADT) which enables the collection of three-dimensional electron diffraction data from nano-sized crystals suitable for ab initio structure analysis. A basic description of the ADT method, nowadays recognized as a reliable and established method, as well as its special features and general applicability to different transmission electron microscopes is provided. In addition, the usability of ADT for crystal structure analysis of single nano-sized crystals with and without special crystallographic features, such as twinning, modulations and disorder is demonstrated.
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Affiliation(s)
- Ute Kolb
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
- Institut für Angewandte Geowissenchaften, Technische Universität Darmstadt, Schnittspahnstrasse 9, Darmstadt, 64287, Germany
| | - Yaşar Krysiak
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Sergi Plana-Ruiz
- Institut für Angewandte Geowissenchaften, Technische Universität Darmstadt, Schnittspahnstrasse 9, Darmstadt, 64287, Germany
- LENS-MIND, Departament d’Enginyeria Electrònica i Biomèdica, Universitat de Barcelona, Martí i Franquès 1, Barcelona, 08028, Spain
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7
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Gemmi M, Lanza AE. 3D electron diffraction techniques. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2019; 75:495-504. [PMID: 32830707 DOI: 10.1107/s2052520619007510] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/23/2019] [Indexed: 06/11/2023]
Abstract
3D electron diffraction is an emerging technique for the structural analysis of nanocrystals. The challenges that 3D electron diffraction has to face for providing reliable data for structure solution and the different ways of overcoming these challenges are described. The route from zone axis patterns towards 3D electron diffraction techniques such as precession-assisted electron diffraction tomography, rotation electron diffraction and continuous rotation is also discussed. Finally, the advantages of the new hybrid detectors with high sensitivity and fast readout are demonstrated with a proof of concept experiment of continuous rotation electron diffraction on a natrolite nanocrystal.
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Affiliation(s)
- Mauro Gemmi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Arianna E Lanza
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, Pisa, 56127, Italy
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8
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Lanza AE, Gemmi M, Bindi L, Mugnaioli E, Paar WH. Daliranite, PbHgAs2S5: determination of the incommensurately modulated structure and revision of the chemical formula. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS 2019; 75:711-716. [DOI: 10.1107/s2052520619007340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 05/20/2019] [Indexed: 01/16/2023]
Abstract
The incommensurately modulated crystal structure of the mineral daliranite has been determined using 3D electron diffraction data obtained on nanocrystalline domains. Daliranite is orthorhombic with a = 21, b = 4.3, c = 9.5 Å and shows modulation satellites along c. The solution of the average structure in the Pnma space group together with energy-dispersive X-ray spectroscopy data obtained on the same domains indicate a chemical formula of PbHgAs2S5, which has one S fewer than previously reported. The crystal structure of daliranite is built from columns of face-sharing PbS8 bicapped trigonal prisms laterally connected by [2+4]Hg polyhedra and (As3+
2S5)4− groups. The excellent quality of the electron diffraction data allows a structural model to be built for the modulated structure in superspace, which shows that the modulation is due to an alternated occupancy of a split As site.
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9
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Gorelik TE, van de Streek J, Meier H, Andernach L, Opatz T. Crystal structure analysis of a star-shaped triazine compound: a combination of single-crystal three-dimensional electron diffraction and powder X-ray diffraction. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2018; 74:287-294. [PMID: 29927391 DOI: 10.1107/s2052520618006686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 05/01/2018] [Indexed: 06/08/2023]
Abstract
The solid-state structure of star-shaped 2,4,6-tris{(E)-2-[4-(dimethylamino)-phenyl]ethenyl}-1,3,5-triazine is determined from a powder sample by exploiting the respective strengths of single-crystal three-dimensional electron diffraction and powder X-ray diffraction data. The unit-cell parameters were determined from single crystal electron diffraction data. Using this information, the powder X-ray diffraction data were indexed, and the crystal structure was determined from the powder diffraction profile. The compound crystallizes in a noncentrosymmetric space group, P212121. The molecular conformation in the crystal structure was used to calculate the molecular dipole moment of 3.22 Debye, which enables the material to show nonlinear optical effects.
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Affiliation(s)
- Tatiana E Gorelik
- Institute of Physical Chemistry, Johannes Gutenberg-University Mainz, Jakob Welder Weg 11, Mainz, 55099, Germany
| | - Jacco van de Streek
- Institute for Inorganic and Analytical Chemistry, Goethe-University Frankfurt, Max-von-Laue-Str. 7, Frankfurt am Main, 60438, Germany
| | - Herbert Meier
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Lars Andernach
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Till Opatz
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
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11
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Abstract
The problem of searching for low-dimensional magnetic systems has been a topical subject and has attracted attention of the chemistry and physics community for the last decade. In low-dimensional magnetic systems, magnetic ions are distributed anisotopically and form different groups such as dimers, chains, ladders, or planes. In 3D frameworks, the distances between magnetic ions are equal in all directions while in low-dimensional systems the distances within groups are different from those between groups. The main approach of searching for desired systems is a priori crystal chemical design expecting the needed distribution of transition metal ions in the resulting structure. One of the main concepts of this structural design is the incorporation of the p-element ions with stereochemically active electron pairs and ions acting as spacers in the composition. Transition metal selenite halides, substances that combine SeO32− groups and halide ions in the structure, seem to be a promising object of investigation. Up to now, there are 33 compounds that are structurally described, magnetically characterized, and empirically tested on different levels. The presented review will summarize structural peculiarities and observed magnetic properties of the known transition metal selenite halides. In addition, the known compounds will be analyzed as possible low-dimensional magnetic systems.
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12
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Single-crystal analysis of nanodomains by electron diffraction tomography: mineralogy at the order-disorder borderline. ACTA ACUST UNITED AC 2018. [DOI: 10.1515/zkri-2017-2130] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Electron diffraction tomography is a powerful emerging method for the structure characterization of materials available only as sub-micrometric grains. This technique can in fact deliver complete 3D information from a single crystal of few hundreds or few tens of nanometers, allowing the analysis of polyphasic or polytypic mixtures that generally cannot be fully addressed by X-ray methods. In this paper, we report and discuss three mineralogy-related study cases where electron diffraction tomography was the only way for achieving a proper description of the sample, by the identification and the structure determination of all the phases or all the polytypes within. We also show how electron diffraction tomography and dynamical refinement can be combined for finding accurate atomic positions and localizing hydrogen atoms at room conditions. Finally, we stress the future potential of this method in the fields of mineralogy and experimental petrology, where till now many samples cannot be properly described because nanocrystalline, polyphasic or disordered. Electron diffraction tomography can be used for detecting unexpected or unknown phases in high-pressure synthetic yields or for the characterization of fine rocks formed under extreme conditions, like impactites or meteorites. Eventually, this method allows the structure characterization of single domains that are ordered only at the scale of few cell repetitions, and therefore it makes possible investigating those materials at the borderline between crystalline and amorphous matter and delivers crucial and unique elements for the understanding of the first stages of solid matter organization.
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13
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Wang X, Jiang X, Liu H, Yang L, Lin Z, Hu Z, Meng X, Chen X, Qin J. Pb3(SeO3)Br4: a new nonlinear optical material with enhanced SHG response designedviaan ion-substitution strategy. Dalton Trans 2018; 47:1911-1917. [DOI: 10.1039/c7dt04443g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A new NLO material has been designedviaion-substitution from a similar structure. It shows an enhanced SHG response equalling to that of KH2PO4(KDP) and a high laser damage threshold of 67 MW cm−1.
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Affiliation(s)
- Xiaoxiao Wang
- Hubei Key Laboratory on Organic and Polymeric Opto-electronic Materials
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Xingxing Jiang
- Beijing Center for Crystal R&D
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Hongming Liu
- Hubei Key Laboratory on Organic and Polymeric Opto-electronic Materials
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Lei Yang
- Beijing Center for Crystal R&D
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Zheshuai Lin
- Beijing Center for Crystal R&D
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Zhanggui Hu
- Beijing Center for Crystal R&D
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Xianggao Meng
- College of Chemistry
- Central China Normal University
- Wuhan 430079
- China
| | - Xingguo Chen
- Hubei Key Laboratory on Organic and Polymeric Opto-electronic Materials
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Jingui Qin
- Hubei Key Laboratory on Organic and Polymeric Opto-electronic Materials
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
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14
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Divalent metal phosphonates – new aspects for syntheses, in situ characterization and structure solution. Z KRIST-CRYST MATER 2017. [DOI: 10.1515/zkri-2016-1971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractDivalent metal phosphonates are promising hybrid materials with a broad field of application. The rich coordination chemistry of the phosphonate linkers enables the formation of structures with different dimensionalities ranging from isolated complexes and layered structures to porous frameworks incorporating various functionalities through the choice of the building blocks. In brief, metal phosphonates offer an interesting opportunity for the design of multifunctional materials. Here, we provide a short review on the class of divalent metal phosphonates discussing their syntheses, structures, and applications. We present the advantages of the recently introduced mechanochemical pathway for the synthesis of divalent phosphonates as a possibility to generate new, in certain cases metastable compounds. The benefits of
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15
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Lepoittevin C. Structure resolution by electron diffraction tomography of the complex layered iron-rich Fe-2234-type Sr5Fe6O15.4. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.08.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Gorelik TE, Czech C, Hammer SM, Schmidt MU. Crystal structure of disordered nanocrystalline αII-quinacridone determined by electron diffraction. CrystEngComm 2016. [DOI: 10.1039/c5ce01855b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The nanocrystalline αII-phase of the industrially produced organic pigment quinacridone was studied by 3D electron diffraction. The average crystal structure was obtained directly from the data and validated by energy minimization. A model describing the experimentally observed diffuse scattering was proposed.
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Affiliation(s)
- T. E. Gorelik
- Institute of Physical Chemistry
- University of Mainz
- Mainz, Germany
| | - C. Czech
- Institute of Inorganic and Analytical Chemistry
- Goethe-University Frankfurt am Main
- Frankfurt am Main, Germany
| | - S. M. Hammer
- Institute of Inorganic and Analytical Chemistry
- Goethe-University Frankfurt am Main
- Frankfurt am Main, Germany
| | - M. U. Schmidt
- Institute of Inorganic and Analytical Chemistry
- Goethe-University Frankfurt am Main
- Frankfurt am Main, Germany
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17
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Kovrugin VM, Krivovichev SV, Mentré O, Colmont M. [NaCl][Cu(HSeO3)2], NaCl-intercalated Cu(HSeO3)2: synthesis, crystal structure and comparison with related compounds. Z KRIST-CRYST MATER 2015. [DOI: 10.1515/zkri-2015-1849] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Single crystals of [NaCl][Cu(HSeO3)2] have been prepared by the chemical vapor transport reactions. Its crystal structure (monoclinic, C2/c, a = 13.9874(7), b = 7.2594(4), c = 9.0421(5) Å, β = 127.046(2)°, V = 732.81(7) Å3) is based upon electroneutral [Cu(HSeO3)2] sheets formed by corner sharing between the [CuO4] squares and (HSeO3) groups that are parallel to the (100) plane. Each (SeO2OH)– group forms the Oh1...O2 hydrogen bond to an adjacent hydroselenite group to constitute a [(SeO2OH)2]2– dimer that provides additional stabilization of the copper diselenite sheet. The [Cu(HSeO3)2] sheets alternate with the sheets consisting of zigzag–Na–Cl–Na–Cl–chains formed by Cl atoms and disordered Na sites. The chains are parallel to the c axis. The linkage between the alternating electroneutral [Cu(HSeO3)2] and [NaCl] sheets is provided by the Cu–Cl and Na–O bonds. The coordination of Na is fivefold and consists of three O and two Cl atoms. [NaCl][Cu(HSeO3)2] is a new member of the group of compounds based upon the M(HSeO3)2 layers (M2+ = Cu, Co, Cd). The prototype structure for this group is [Cu(HSeO3)2] that does not have any chemical species separating the copper hydroselenite layers. In other compounds, the interlayer space between the [Cu(HSeO3)2]0 layers is occupied by structural units of different complexity. [NaCl][Cu(HSeO3)2] can be considered as [Cu(HSeO3)2] intercalated with the NaCl layers consisting of one-dimensional–Na–Cl–Na–Cl–chains.
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Affiliation(s)
| | | | - Olivier Mentré
- UCCS, ENSCL, Université Lille 1, CNRS, UMR 8181, 59652 Villeneuve d’Ascq, France
| | - Marie Colmont
- UCCS, ENSCL, Université Lille 1, CNRS, UMR 8181, 59652 Villeneuve d’Ascq, France
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18
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Gemmi M, La Placa MGI, Galanis AS, Rauch EF, Nicolopoulos S. Fast electron diffraction tomography. J Appl Crystallogr 2015. [DOI: 10.1107/s1600576715004604] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A fast and fully automatic procedure for collecting electron diffraction tomography data is presented. In the case of a very stable goniometer it is demonstrated how, by variation of the tilting speed and the CCD detector parameters, it is possible to obtain fully automatic precession-assisted electron diffraction tomography data collections, rotation electron diffraction tomography data collections or new integrated electron diffraction tomography data collections, in which the missing wedge of the reciprocal space between the patterns is recorded by longer exposures during the crystal tilt. It is shown how automatic data collection of limited tilt range can be used to determine the unit-cell parameters, while data of larger tilt range are suitable to solve the crystal structureabinitiowith direct methods. The crystal structure of monoclinic MgMoO4has been solved in this way as a test structure. In the case where the goniometer is not stable enough to guarantee a steady position of the crystal over large tilt ranges, an automatic method for tracking the crystal during continuous rotation of the sample is proposed.
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19
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Yun Y, Zou X, Hovmöller S, Wan W. Three-dimensional electron diffraction as a complementary technique to powder X-ray diffraction for phase identification and structure solution of powders. IUCRJ 2015; 2:267-82. [PMID: 25866663 PMCID: PMC4392419 DOI: 10.1107/s2052252514028188] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 12/26/2014] [Indexed: 05/04/2023]
Abstract
Phase identification and structure determination are important and widely used techniques in chemistry, physics and materials science. Recently, two methods for automated three-dimensional electron diffraction (ED) data collection, namely automated diffraction tomography (ADT) and rotation electron diffraction (RED), have been developed. Compared with X-ray diffraction (XRD) and two-dimensional zonal ED, three-dimensional ED methods have many advantages in identifying phases and determining unknown structures. Almost complete three-dimensional ED data can be collected using the ADT and RED methods. Since each ED pattern is usually measured off the zone axes by three-dimensional ED methods, dynamic effects are much reduced compared with zonal ED patterns. Data collection is easy and fast, and can start at any arbitrary orientation of the crystal, which facilitates automation. Three-dimensional ED is a powerful technique for structure identification and structure solution from individual nano- or micron-sized particles, while powder X-ray diffraction (PXRD) provides information from all phases present in a sample. ED suffers from dynamic scattering, while PXRD data are kinematic. Three-dimensional ED methods and PXRD are complementary and their combinations are promising for studying multiphase samples and complicated crystal structures. Here, two three-dimensional ED methods, ADT and RED, are described. Examples are given of combinations of three-dimensional ED methods and PXRD for phase identification and structure determination over a large number of different materials, from Ni-Se-O-Cl crystals, zeolites, germanates, metal-organic frameworks and organic compounds to intermetallics with modulated structures. It is shown that three-dimensional ED is now as feasible as X-ray diffraction for phase identification and structure solution, but still needs further development in order to be as accurate as X-ray diffraction. It is expected that three-dimensional ED methods will become crucially important in the near future.
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Affiliation(s)
- Yifeng Yun
- Berzelii Center EXSELENT on Porous Materials and Inorganic and Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Xiaodong Zou
- Berzelii Center EXSELENT on Porous Materials and Inorganic and Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Sven Hovmöller
- Berzelii Center EXSELENT on Porous Materials and Inorganic and Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Wei Wan
- Berzelii Center EXSELENT on Porous Materials and Inorganic and Structural Chemistry, Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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Sr4Ru6ClO18, a new Ru4+/5+ oxy-chloride, solved by precession electron diffraction: Electric and magnetic behavior. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Palatinus L, Jacob D, Cuvillier P, Klementová M, Sinkler W, Marks LD. Structure refinement from precession electron diffraction data. Acta Crystallogr A 2013; 69:171-88. [PMID: 23403968 DOI: 10.1107/s010876731204946x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 12/02/2012] [Indexed: 11/10/2022] Open
Abstract
Electron diffraction is a unique tool for analysing the crystal structures of very small crystals. In particular, precession electron diffraction has been shown to be a useful method for ab initio structure solution. In this work it is demonstrated that precession electron diffraction data can also be successfully used for structure refinement, if the dynamical theory of diffraction is used for the calculation of diffracted intensities. The method is demonstrated on data from three materials - silicon, orthopyroxene (Mg,Fe)(2)Si(2)O(6) and gallium-indium tin oxide (Ga,In)(4)Sn(2)O(10). In particular, it is shown that atomic occupancies of mixed crystallographic sites can be refined to an accuracy approaching X-ray or neutron diffraction methods. In comparison with conventional electron diffraction data, the refinement against precession diffraction data yields significantly lower figures of merit, higher accuracy of refined parameters, much broader radii of convergence, especially for the thickness and orientation of the sample, and significantly reduced correlations between the structure parameters. The full dynamical refinement is compared with refinement using kinematical and two-beam approximations, and is shown to be superior to the latter two.
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Affiliation(s)
- Lukáš Palatinus
- Institute of Physics of the AS CR, v.v.i., Na Slovance 2, 182 21 Prague, Czech Republic.
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Scanning reciprocal space for solving unknown structures: energy filtered diffraction tomography and rotation diffraction tomography methods. Z KRIST-CRYST MATER 2013. [DOI: 10.1524/zkri.2013.1559] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gemmi M, Oleynikov P. Scanning reciprocal space for solving unknown structures: energy filtered diffraction tomography and rotation diffraction tomography methods. Z KRIST-CRYST MATER 2012. [DOI: 10.1524/zkri.2012.1559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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