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Vosegaard E, Ahlburg J, Takahashi S, Nishibori E, Iversen B. Comparative study of in-house and synchrotron X-ray electron densities of molecular crystals. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Kawaguchi S, Takemoto M, Osaka K, Nishibori E, Moriyoshi C, Kubota Y, Kuroiwa Y, Sugimoto K. High-throughput powder diffraction measurement system consisting of multiple MYTHEN detectors at beamline BL02B2 of SPring-8. Rev Sci Instrum 2017; 88:085111. [PMID: 28863664 DOI: 10.1063/1.4999454] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, we developed a user-friendly automatic powder diffraction measurement system for Debye-Scherrer geometry using a capillary sample at beamline BL02B2 of SPring-8. The measurement system consists of six one-dimensional solid-state (MYTHEN) detectors, a compact auto-sampler, wide-range temperature control systems, and a gas handling system. This system enables to do the automatic measurement of temperature dependence of the diffraction patterns for multiple samples. We introduced two measurement modes in the MYTHEN system and developed new attachments for the sample environment such as a gas handling system. The measurement modes and the attachments can offer in situ and/or time-resolved measurements in an extended temperature range between 25 K and 1473 K and various gas atmospheres and pressures. The results of the commissioning and performance measurements using reference materials (NIST CeO2 674b and Si 640c), V2O3 and Ti2O3, and a nanoporous coordination polymer are presented.
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Affiliation(s)
- S Kawaguchi
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - M Takemoto
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - K Osaka
- Industrial Application Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - E Nishibori
- Faculty of Pure and Applied Sciences, TIMS and CiRfSE, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - C Moriyoshi
- Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Y Kubota
- Department of Physical Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Y Kuroiwa
- Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - K Sugimoto
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
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Nakatsuji S, Kuga K, Kimura K, Satake R, Katayama N, Nishibori E, Sawa H, Ishii R, Hagiwara M, Bridges F, Ito TU, Higemoto W, Karaki Y, Halim M, Nugroho AA, Rodriguez-Rivera JA, Green MA, Broholm C. Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice. Science 2012; 336:559-63. [DOI: 10.1126/science.1212154] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Svendsen H, Overgaard J, Busselez R, Arnaud B, Rabiller P, Kurita A, Nishibori E, Sakata M, Takata M, Iversen BB. Multipole electron-density modelling of synchrotron powder diffraction data: the case of diamond. Acta Crystallogr A 2010; 66:458-69. [PMID: 20555186 DOI: 10.1107/s0108767310014236] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Accepted: 04/18/2010] [Indexed: 11/11/2022] Open
Abstract
Accurate structure factors are extracted from synchrotron powder diffraction data measured on crystalline diamond based on a novel multipole model division of overlapping reflection intensities. The approach limits the spherical-atom bias in structure factors extracted from overlapping powder data using conventional spherical-atom Rietveld refinement. The structure factors are subsequently used for multipole electron-density modelling, and both the structure factors and the derived density are compared with results from ab initio theoretical calculations. Overall, excellent agreement is obtained between experiment and theory, and the study therefore demonstrates that synchrotron powder diffraction can indeed provide accurate structure-factor values based on data measured in minutes with limited sample preparation. Thus, potential systematic errors such as extinction and twinning commonly encountered in single-crystal studies of small-unit-cell inorganic structures can be overcome with synchrotron powder diffraction. It is shown that the standard Hansen-Coppens multipole model is not flexible enough to fit the static theoretical structure factors, whereas fitting of thermally smeared structure factors has much lower residuals. If thermally smeared structure factors (experimental or theoretical) are fitted with a slightly wrong radial model (s(2)p(2) instead of sp(3)) the radial scaling parameters (kappa' parameters) are found to be inadequate and the ;error' is absorbed into the atomic displacement parameter. This directly exposes a correlation between electron density and thermal parameters even for a light atom such as carbon, and it also underlines that in organic systems proper deconvolution of thermal motion is important for obtaining correct static electron densities.
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Affiliation(s)
- H Svendsen
- Center for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, DK-8000 Aarhus C, Denmark
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Skovsen I, Bjerg L, Christensen M, Nishibori E, Balke B, Felser C, Iversen BB. Multi-temperature synchrotron PXRD and physical properties study of half-Heusler TiCoSb. Dalton Trans 2010; 39:10154-9. [DOI: 10.1039/c0dt00742k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Takata M, Nishibori E, Sakata M. Charge density studies utilizing powder diffraction and MEM. Exploring of high Tc superconductors, C60 superconductors and manganites. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.216.2.71.20335] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The recent progress of the accurate charge density studies by the Maximum Entropy Method(MEM) utilizing X-ray powder diffraction is reviewed with some examples. Results for PrBCO (PrBa2Cu3O7-δ), YBCO (YBa2Cu3O7-δ), C60 superconductors (Rb2CsC60, K2RbC60, Na2RbC60) and the layered manganite, NdSr2Mn2O7, which is well known as colossal magnetoresistive (CMR)-related material, are given. For non-super conductor, PrBCO, it is found in the MEM charge density that there exist directional robes of the charge density from Pr atom toward the O atoms in the CuO2 conduction planes. On the other hand, for a very well known high Tc super conductor, YBCO, appreciable charge densities in the interatomic region around the Y atom is not recognized in the MEM charge density. The distinct difference of the charge densities between PrBCO and YBCO presents clear experimental evidence of the hybridization between Pr(4f)–O(2pπ) orbitals which supports the idea that the hole trapping by the hybridizes states suppresses the superconductivity in PrBCO. The MEM charge densities of the fullerene superconductors, Rb2CsC60, K2RbC60 and Na2RbC60, show distinct structural differences from that of non-superconductors, C60 and Li2CsC60, reflecting the superconducting properties. And the charge deficiencies of the doped metal atoms, which should be associated with charge transfer from the metal atoms to the C60 molecule seems to have strong correlation to the superconducting transition temperature, Tc. As the bigger the charge charge trnsfer, the higher the Tc. In the accurate MEM charge density of antiferromagnetic manganite, NdSr2Mn2O7,the direct imaging of spontaneous ordering of the dx
2-y
2 orbital indicating anisotropic exchange couplings between the local-spins on the Mn sites, which causes an unique layered-type spin order. The theoretical background of the MEM is also mentioned in some detail.
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Suzuki K, Ito M, Tsuji N, Kitani K, Adachi H, Nakao H, Murakami Y, Taguchi Y, Tokura Y, Nishibori E, Sakata M. 3D spin density and orbital ordering of YTiO 3observed by X-ray magnetic diffraction experiment. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kuroiwa Y, Terado Y, Moriyoshi C, Aoyagi S, Nishibori E, Sakata M, Takata M. Thermal motion of atoms in cubic structure of perovskites and ferroelectric phase transitions. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308095330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Aoyagi S, Ina H, Nishibori E, Ohishi Y, Sato M, Takata M, Sakata M. High-pressure and low-temperature charge-density study of Pr1−xCaxCoO3by SR powder diffraction. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308080410] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sakata M, Nishibori E, Aoyagi S. Advanced strategy for ab initiostructure determination of pharmaceutical compounds by powder data. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809332x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Pedersen BL, Birkedal H, Nishibori E, Frederiksen PT, Brummerstedt Iversen B. Insights into thermoelectric candidate materials from powder diffraction. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307099023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Sakata M, Kajikawa T, Nishibori E, Ago H, Hamada K, Ishijima J, Miyano M. Structure refinements of protein-ligand complex by the maximum entropy method. Acta Crystallogr A 2005. [DOI: 10.1107/s010876730508222x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Aoyagi S, Toda S, Nishibori E, Kuroiwa Y, Adachi T, Ohishi Y, Takata M, Sakata M. High pressure effect on bonding nature in KMnF 3. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305080645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Misaki S, Ogura T, Aoyagi S, Nishibori E, Sakata M. Ab-initio structure determination of two kinds of forma for adrenal cortical hormone, predonisolone. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305079730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Tada M, Ishikawa S, Sakata M, Ohkubo K, Kyomen T, Nishibori E, Sasaki S. Maximum-entropy and Fourier study on electron density of MnO, LaCoO 3and MgSiO 3". Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305082218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Pedersen BL, Nishibori E, Iversen BB. Dopant atom influence on the α -> β phase transition in thermoelectric Zn 4Sb 3. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305086058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Nishibori E, Fujishiro Y, Sakata M, Kobayashi A, Takata M, Kobayashi H. The structure determination of single-component molecular-metal. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305093323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Matsuno K, Katsufuji T, Mori S, Nohara M, Machida A, Moritomo Y, Kato K, Nishibori E, Takata M, Sakata M, Kitazawa K, Takagi H. Charge ordering and spin frustration in AlV2-x CrxO4. Phys Rev Lett 2003; 90:096404. [PMID: 12689246 DOI: 10.1103/physrevlett.90.096404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2002] [Indexed: 05/24/2023]
Abstract
The relationship between charge and spin degrees of freedom in a geometrically frustrated system, AlV2-xCrxO4 spinel, is investigated. Upon Cr doping, the charge-ordered phase of AlV2O4 is rapidly suppressed and a charge-disordered phase grows up instead. It is found that the magnetic ground state is a spin-glass state dominated by geometrical frustration for both phases, but larger spin entropy remains down to low temperatures in the charge-ordered phase, possibly owing to its two-dimensional character.
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Affiliation(s)
- K Matsuno
- Department of Advanced Materials Science, University of Tokyo, Tokyo 113-8656, Japan
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Abstract
A double shell of Platonic solids: A trajectory that connects the six-membered rings of Ih -C80 is followed by the two La atoms of La2 @C80 according to maximum entropy/Rietveld analysis of the synchrotron powder-diffraction data. The result is a pentagonal-dodecahedral charge-density distribution for La2 (brown in the picture) inside the icosahedral C80 cage (green).
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Affiliation(s)
- E Nishibori
- Department of Applied Physics, Nagoya University Nagoya 464-8603, Japan, Fax: (+81) 52-789-4455
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Sakata M, Takata M, Nishibori E. MEM charge density studies for materials with characteristic physical properties. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302095028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kato K, Nishibori E, Takata M, Sakata M, Nakano T, Uchihira K, Tsubota M, Iga F, Takabatake T. The metal-insulator transition in Y1−xCaxTiO3caused by structural phase separation. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302090906] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Dova E, Stassen AF, Nishibori E, Kato K, Peschar R, Schenk H. Temperature dependent synchrotron X-ray powder diffraction studies: Fe(II) spin crossover complexes. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302095545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hieu Chi D, Iwasa Y, Chen X, Takenobu T, Ito T, Mitani T, Nishibori E, Takata M, Sakata M, Kubozono Y. Bridging fullerenes with metals. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00297-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kuroiwa Y, Aoyagi S, Sawada A, Harada J, Nishibori E, Takata M, Sakata M. Evidence for Pb-O covalency in tetragonal PbTiO3. Phys Rev Lett 2001; 87:217601. [PMID: 11736378 DOI: 10.1103/physrevlett.87.217601] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2001] [Indexed: 05/23/2023]
Abstract
Accurate charge-density distributions of cubic and tetragonal PbTiO3 and BaTiO3 have been obtained by the MEM(maximum entropy method)/Rietveld analysis using synchrotron-radiation powder data. The Pb-O bonds in tetragonal PbTiO3 show rather strong covalency, while those in cubic PbTiO3 are ionic. This is the clear evidence of the Pb-O hybridization in tetragonal PbTiO3, which has been theoretically predicted as a key factor of much larger ferroelectricity of this substance than that of BaTiO3. Tetragonal PbTiO3 forms a layered structure of a two-dimensional covalent-bonding network consisting of the Ti-O5 pyramid.
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Affiliation(s)
- Y Kuroiwa
- Department of Physics, Okayama University, Okayama 700-8530, Japan.
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Wang CR, Kai T, Tomiyama T, Yoshida T, Kobayashi Y, Nishibori E, Takata M, Sakata M, Shinohara H. C66 fullerene encaging a scandium dimer. Nature 2000; 408:426-7. [PMID: 11100714 DOI: 10.1038/35044195] [Citation(s) in RCA: 574] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- C R Wang
- Department of Chemistry, Nagoya University, Japan
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Kirihara K, Nakata T, Takata M, Kubota Y, Nishibori E, Kimura K, Sakata M. Covalent bonds in AlMnSi icosahedral quasicrystalline approximant. Phys Rev Lett 2000; 85:3468-3471. [PMID: 11030923 DOI: 10.1103/physrevlett.85.3468] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2000] [Indexed: 05/23/2023]
Abstract
Electron density distributions were obtained using the maximum entropy method with synchrotron radiation powder data. In the metallic Al12Re, metallic bonding was observed for the icosahedral Al12 cluster with central Re atom. In the nonmetallic alpha-AlMnSi 1/1 approximant, covalent bonds were found in the electron density distribution of the Mackay icosahedral cluster without central atom. Rather than the Hume-Rothery mechanism, the covalency of Al (Si) icosahedron and that between Al (Si) and Mn atoms is considered to be the origin of the pseudogap and nonmetallic behavior of alpha-AlMnSi.
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Affiliation(s)
- K Kirihara
- Department of Materials Science, the University of Tokyo, 113-8656, Japan
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Nishibori E, Takata M, Kato K, Kubota Y, Aoyagi, Kuroiwa Y, Ikeda S, Sakata M. Structural Studies by the Debye-Scherrer Camera installed at BL02B2, Spring-8. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300024788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Nishibori E, Takata M, Sakata M, Shinohara H. Structural studies of endohedral metallofullerenes by synchrotron radiation powder diffraction. J Synchrotron Radiat 1998; 5:977-979. [PMID: 15263717 DOI: 10.1107/s0909049597016816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/13/1997] [Indexed: 05/24/2023]
Abstract
The endohedral natures of the metallofullerenes Y@C(82) and Sc(2)@C(8)4 are described based on synchrotron radiation powder diffraction experiments. For structural analysis, a combination of the maximum-entropy method (MEM) and Rietveld refinement was employed to analyse the complicated powder pattern. The obtained MEM charge densities show a clear distinction of the endohedral natures of the mono- and dimetallofullerenes.
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Affiliation(s)
- E Nishibori
- Department of Applied Physics, Nagoya University, Nagoya 464-01, Japan
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Takata M, Nishibori E, Umeda B, Sakata M, Ohno M, Shinohara H, Saito Y. Determination of the endohedral nature of the metallofullerene Y@C 82by MEM. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396083377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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