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Jia S, Zhou Q, Li F, Hu Y, Wang C, Wang X, He S, Li X, Li L, Cui T. High-pressure Bandgap Engineering and Amorphization in TiNb2O7 Single Crystals. CrystEngComm 2022. [DOI: 10.1039/d2ce00168c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium niobate (TiNb2O7) possesses excellent photocatalytic, dielectric properties, and lithium-insertion capacity. And high-pressure (HP) is a powerful tool for bandgap engineering aiming at widening their applications. Herein, we report the...
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Li X, Li H, Li P, Li R, Liu J, Li Y, Cui W. A high-pressure single-crystal-diffraction experimental system at 4W2 beamline of BSRF. J Synchrotron Radiat 2017; 24:699-706. [PMID: 28452764 DOI: 10.1107/s1600577517003393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 03/01/2017] [Indexed: 06/07/2023]
Abstract
Information on the structural evolution of materials under high pressure is of great importance for understanding the properties of materials exhibited under high pressure. High-pressure powder diffraction is widely used to investigate the structure evolution of materials at such pressure. Unfortunately, powder diffraction data are usually insufficient for retrieving the atomic structures, with high-pressure single-crystal diffraction being more desirable for such a purpose. Here, a high-pressure single-crystal diffraction experimental system developed recently at beamline 4W2 of Beijing Synchrotron Radiation Facility (BSRF) is reported. The design and operation of this system are described with emphasis on special measures taken to allow for the special circumstance of high-pressure single-crystal diffraction. As an illustration, a series of diffraction datasets were collected on a single crystal of LaB6 using this system under various pressures (from ambient pressure to 39.1 GPa). The quality of the datasets was found to be sufficient for structure solution and subsequent refinement.
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Affiliation(s)
- Xiaodong Li
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Hui Li
- Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing 100124, People's Republic of China
| | - Pengshan Li
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Rui Li
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Jing Liu
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Yanchun Li
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Weiran Cui
- Beijing Synchrotron Radition Facility, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
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Abstract
We investigated the effects of high pressure on the electronic structure and optical properties of a CsI crystal through a first-principles calculation method based on density functional theory.
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Affiliation(s)
- Qiang Zhao
- Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy
- North China Electric Power University
- Beijing 102206
- P. R. China
| | - Zheng Zhang
- Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy
- North China Electric Power University
- Beijing 102206
- P. R. China
| | - Xiaoping Ouyang
- Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy
- North China Electric Power University
- Beijing 102206
- P. R. China
- Northwest Institute of Nuclear Technology
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Wei S, Wang J, Deng S, Zhang S, Li Q. Hypervalent Iodine with Linear Chain at High Pressure. Sci Rep 2015; 5:14393. [PMID: 26399899 DOI: 10.1038/srep14393] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/28/2015] [Indexed: 11/08/2022] Open
Abstract
Iodine is an element of fascinating chemical complexity, and numerous hypervalent iodine compounds reveal vital value of applications in organic synthesis. Investigation of the synthesis and application of new type of hypervalent iodine compound has extremely significant meaning. Here, the formation of CsIn (n > 1) compounds is predicted up to 200 GPa using an effective algorithm. The current results show that CsI3 with space group of Pm-3n is thermodynamically stable under high pressure. Hypervalence phenomenon of iodine atoms in Pm-3n CsI3 with endless linear chain type structure appears under high pressure, which is in sharp contrast to the conventional understanding. Our study further reveals that Pm-3n CsI3 is a metallic phase with several energy bands crossing Fermi-surface, and the pressure creates a peculiar reverse electron donation from iodine to cesium. The electron-phonon coupling calculations have proposed superconductive potential of the metallic Pm-3n CsI3 at 10 GPa which is much lower than that of CsI (180 GPa). Our findings represent a significant step toward the understanding of the behavior of iodine compounds at extreme conditions.
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McMahon MI. Diamonds on Diamond: structural studies at extreme conditions on the Diamond Light Source. Philos Trans A Math Phys Eng Sci 2015; 373:rsta.2013.0158. [PMID: 25624513 DOI: 10.1098/rsta.2013.0158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Extreme conditions (EC) research investigates how the structures and physical and chemical properties of materials change when subjected to extremes of pressure and temperature. Pressures in excess of one million times atmospheric pressure can be achieved using a diamond anvil cell, and, in combination with high-energy, micro-focused radiation from a third-generation synchrotron such as Diamond, detailed structural information can be obtained using either powder or single-crystal diffraction techniques. Here, I summarize some of the research drivers behind international EC research, and then briefly describe the techniques by which high-quality diffraction data are obtained. I then highlight the breadth of EC research possible on Diamond by summarizing four examples from work conducted on the I15 and I19 beamlines, including a study which resulted in the first research paper from Diamond. Finally, I look to the future, and speculate as to the type of EC research might be conducted at Diamond over the next 10 years.
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Affiliation(s)
- M I McMahon
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, UK Research Complex at Harwell, Didcot, Oxfordshire OX11 0DE, UK
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Abstract
Above 350 GPa KCl assumes an hcp lattice that is reminiscent of the isoelectronic noble gas Ar.
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Affiliation(s)
- Andrew Shamp
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
| | - Patrick Saitta
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
| | - Eva Zurek
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
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Abstract
The advent of the ESRF, APS and SPring-8 third-generation synchrotron sources in the mid-1990s heralded a golden age of high-pressure X-ray science. The high-energy monochromatic micro-focused X-ray beams from these storage rings, combined with the new high-pressure diffraction and spectroscopy techniques developed in the late 1980s, meant that researchers were immediately able to make detailed structural studies at pressures comparable with those at the centre of the Earth, studies that were simply not possible only five years previously. And new techniques, such as X-ray inelastic scattering and X-ray nuclear scattering, became possible at high pressure for the first time, providing wholly-new insight into the behaviour of materials at high densities. The arrival of new diffraction-limited storage rings, with their much greater brightness, and ability to achieve focal-spot diameters for high-energy X-ray beams of below 1 µm, offers the possibility of a new generation of high-pressure science, both extending the scope of what is already possible, and also opening ways to wholly-new areas of investigation.
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Affiliation(s)
- Malcolm I McMahon
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Edinburgh, UK
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Abstract
The ability of pressure to change inter-atomic distances strongly leads to a wide range of pressure-induced phenomena at high pressures: for example metallisation, amorphisation, superconductivity and polymerisation. Key to understanding these phenomena is the determination of the crystal structure using x-ray or neutron diffraction. The tools necessary to compress matter above 1 million atmospheres (1 Megabar or 100 GPa) were established by the mid 1970s, but it is only since the early 1990s that we have been able to determine the detailed crystal structures of materials at such pressures. In this chapter I briefly review the history of high-pressure crystallography, and describe the techniques used to obtain and study materials at high pressure. Recent crystallographic studies of elements are then used to illustrate what is now possible using modern detectors and synchrotron sources. Finally, I speculate as to what crystallographic studies might become possible over the next decade.
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Affiliation(s)
- Malcolm I McMahon
- SUPA, Centre for Science at Extreme Conditions, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3JZ, UK.
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Wang L, Ding Y, Yang W, Liu W, Cai Z, Kung J, Shu J, Hemley RJ, Mao WL, Mao HK. Nanoprobe measurements of materials at megabar pressures. Proc Natl Acad Sci U S A 2010; 107:6140-5. [PMID: 20304801 DOI: 10.1073/pnas.1001141107] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The use of nanoscale x-ray probes overcomes several key limitations in the study of materials up to multimegabar (> 200) pressures, namely, the spatial resolution of measurements of multiple samples, stress gradients, and crystal domains in micron to submicron size samples in diamond-anvil cells. Mixtures of Fe, Pt, and W were studied up to 282 GPa with 250-600 nm size synchrotron x-ray absorption and diffraction probes. The probes readily resolve signals from individual materials, between sample and gasket, and peak pressures, in contrast to the 5-microm-sized x-ray beams that are now becoming routine. The use of nanoscale x-ray beams also enables single-crystal x-ray diffraction studies in nominally polycrystalline samples at ultrahigh pressures, as demonstrated in measurements of (Mg,Fe)SiO(3) postperovskite. These capabilities have potential for driving a push toward higher maximum pressures and further miniaturization of high-pressure devices, in the process advancing studies at extreme conditions.
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Abstract
Diamond-anvil-cell and shock-wave technologies now permit the study of matter under multimegabar pressure (that is, of several hundred GPa). The properties of matter in this pressure regime differ drastically from those known at 1 atm (about 10(5) Pa). Just how different chemistry is at high pressure and what role chemical intuition for bonding and structure can have in understanding matter at high pressure will be explored in this account. We will discuss in detail an overlapping hierarchy of responses to increased density: a) squeezing out van der Waals space (for molecular crystals); b) increasing coordination; c) decreasing the length of covalent bonds and the size of anions; and d) in an extreme regime, moving electrons off atoms and generating new modes of correlation. Examples of the startling chemistry and physics that emerge under such extreme conditions will alternate in this account with qualitative chemical ideas about the bonding involved.
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Affiliation(s)
- Wojciech Grochala
- ICM and Department of Chemistry, Warsaw University, Warsaw 02-106, Poland.
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Grochala W, Hoffmann R, Feng J, Ashcroft N. Chemie unter höchsten Drücken: eine Herausforderung für die chemische Intuition. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200602485] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kechin VV. Comment on "Molecular dynamics study of melting and fcc-bcc transitions in Xe". Phys Rev Lett 2002; 89:119601. [PMID: 12225173 DOI: 10.1103/physrevlett.89.119601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2002] [Indexed: 05/23/2023]
Affiliation(s)
- V V Kechin
- Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow region, 142190, Russia
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Abstract
Direct electrical transport measurements in a diamond anvil cell provide evidence for the metallization of cesium iodide (CsI) at a pressure of 115 gigapascals. A drop in the temperature dependence of the resistance was found at pressures above 180 gigapascals, indicating that the CsI was superconductive. The superconductivity changed under the influence of a magnetic field to a lower critical temperature and disappeared above 0.3 tesla. The highest critical temperature at which superconductivity was observed was 2 kelvin, and the critical temperature decreased with increasing pressure.
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Affiliation(s)
- MI Eremets
- M. I. Eremets and T. C. Kobayashi, Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan. K. Shimizu, Department of Physical Science, Graduate School of Engineering Science, Osaka
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Affiliation(s)
- Russell J. Hemley
- The author [] is at the Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, Washington, DC 20015, USA
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Reichlin R, McMahan AK, Ross M, Martin S, Hu J, Hemley RJ, Mao H, Wu Y. Optical, x-ray, and band-structure studies of iodine at pressures of several megabars. Phys Rev B Condens Matter 1994; 49:3725-3733. [PMID: 10011262 DOI: 10.1103/physrevb.49.3725] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Söderlind P, Eriksson O, Wills JM, Johansson B. Local-moment collapse in compressed samarium metal. Phys Rev B Condens Matter 1993; 48:9212-9215. [PMID: 10007153 DOI: 10.1103/physrevb.48.9212] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cheetham AK, Wilkinson AP. Beugungsuntersuchungen mit Synchrotron-Röntgen- und Neutronenstrahlen in der Festkörperchemie. Angew Chem Int Ed Engl 1992. [DOI: 10.1002/ange.19921041205] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nardelli MB, Baroni S, Giannozzi P. Phonon softening and high-pressure low-symmetry phases of cesium iodide. Phys Rev Lett 1992; 69:1069-1072. [PMID: 10047115 DOI: 10.1103/physrevlett.69.1069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Aleksandrov IV, Goncharov AF, Makarenko IN, Stishov SM. X-ray-diffraction study of the equation of state and the phase transition in cesium iodide at nearly hydrostatic pressure. Phys Rev B Condens Matter 1991; 43:6194-6197. [PMID: 9998036 DOI: 10.1103/physrevb.43.6194] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Vohra YK, Vanderborgh CA, Desgreniers S, Ruoff AL. Comment on "Ruby at high pressure. I. Optical line shifts to 156 GPa". Phys Rev B Condens Matter 1990; 42:9189-9190. [PMID: 9995142 DOI: 10.1103/physrevb.42.9189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Vohra YK, Ruoff AL. Static compression of metals Mo, Pb, and Pt to 272 GPa: Comparison with shock data. Phys Rev B Condens Matter 1990; 42:8651-8654. [PMID: 9995051 DOI: 10.1103/physrevb.42.8651] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Feldman JL, Klein BM, Mehl MJ, Krakauer H. Metallization pressure for NaCl in the B2 structure. Phys Rev B Condens Matter 1990; 42:2752-2760. [PMID: 9995763 DOI: 10.1103/physrevb.42.2752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mao HK, Wu Y, Hemley RJ, Chen LC, Shu JF, Finger LW, Cox DE. High-pressure phase transition and equation of state of CsI. Phys Rev Lett 1990; 64:1749-1752. [PMID: 10041479 DOI: 10.1103/physrevlett.64.1749] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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