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Nothdurft S, Breitenbuecher F, Okimoto R, Bivona T, Gruener B, Hoelzel M, Forster J, Kalmbach S, Schramm A, Schuler M. MA17.07 Identification of AHR as a Novel Regulator of Lung Cancer Metastasis. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.642] [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: 11/15/2022]
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Röska B, Park SH, Behal D, Hess KU, Günther A, Benka G, Pfleiderer C, Hoelzel M, Kimura T. Determination of the hydrogen-bond network and the ferrimagnetic structure of a rockbridgeite-type compound, [Formula: see text]. J Phys Condens Matter 2018; 30:235401. [PMID: 29701605 DOI: 10.1088/1361-648x/aac0cd] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Applying neutron powder diffraction, four unique hydrogen positions were determined in a rockbridgeite-type compound, [Formula: see text] [Formula: see text]. Its honeycomb-like H-bond network running without interruption along the crystallographic [Formula: see text] axis resembles those in alkali sulphatic and arsenatic oxyhydroxides. They provide the so-called dynamically disordered H-bond network over which protons are superconducting in a vehicle mechanism. This is indicated by dramatic increases of dielectric constant and loss factor at room temperature. The relevance of static and dynamic disorder of OH and HOH groups are explained in terms of a high number of structural defects at octahedral chains alternatingly half-occupied by [Formula: see text] cations. The structure is built up by unusual octahedral doublet, triplet, and quartet clusters of aliovalent 3d transition metal cations, predicting complicate magnetic ordering and interaction. The ferrimagnetic structure below the Curie temperature [Formula: see text]-83 K could be determined from the structure analysis with neutron diffraction data at 25 K.
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Affiliation(s)
- B Röska
- Department of Geo- and Environmental Sciences, Section of Crystallography, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
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Hinterstein M, Mgbemere HE, Hoelzel M, Rheinheimer W, Adabifiroozjaei E, Koshy P, Sorrell CC, Hoffman M. Influence of microstructure on symmetry determination of piezoceramics. J Appl Crystallogr 2018. [DOI: 10.1107/s1600576718003916] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The origin of the complex reflection splitting in potassium sodium niobate doped with lithium and manganese was investigated using temperature-dependent high-resolution X-ray and neutron diffraction as well as electron probe microanalysis and scanning electron microscopy. Two structural models were developed from the diffraction data. A single-phase monoclinic Pm model is known from the literature and is able to reproduce the diffraction patterns perfectly. However, a model with phase coexistence of two classical orthorhombic Amm2 phases can also reproduce the diffraction data with equal accuracy. Scanning electron microscopy in combination with electron probe microanalysis revealed segregation of the A-site substituents potassium and sodium. This favours the model with phase coexistence and confirms the need for comprehensive analyses with complementary methods to cover a broad range of length scales as well as to assess both average and local structure.
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Abstract
The reaction of uranium tetrachloride with anhydrous liquid hydrogen cyanide yields a turquoise microcrystalline powder of tetrachloridotetraformonitrileuranium(iv), [UCl4(HCN)4].
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Affiliation(s)
- S. S. Rudel
- Fachbereich Chemie, Philipps-Universität Marburg
- 35032 Marburg
- Germany
- WZMW
- 35032 Marburg
| | - C. Pietzonka
- Fachbereich Chemie, Philipps-Universität Marburg
- 35032 Marburg
- Germany
- WZMW
- 35032 Marburg
| | - M. Hoelzel
- Forschungs-Neutronenquelle Heinz Maier-Leibnitz
- 85747 Garching
- Germany
| | - F. Kraus
- Fachbereich Chemie, Philipps-Universität Marburg
- 35032 Marburg
- Germany
- WZMW
- 35032 Marburg
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Mukherji D, Gilles R, Karge L, Strunz P, Beran P, Eckerlebe H, Stark A, Szentmiklosi L, Mácsik Z, Schumacher G, Zizak I, Hofmann M, Hoelzel M, Rösler J. Neutron and synchrotron probes in the development of Co–Re-based alloys for next generation gas turbines with an emphasis on the influence of boron additives. J Appl Crystallogr 2014. [DOI: 10.1107/s1600576714013624] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Nickel-based superalloys are the materials of choice in the hot section of current gas turbines, but they are reaching temperature limits constrained by their melting temperature range. Co–Re alloy development was prompted by a search for new materials for future gas turbines, where the temperature of application will be considerably higher. Addition of the very high melting point refractory metal Re to Co can increase the melting range of Co alloys to much higher temperatures than the commercial Co alloys in use today. The alloy development strategy is first discussed very briefly. In this program, model ternary and quaternary compositions were studied in order to develop a basic understanding of the alloy system.In situneutron and synchrotron measurements (small and wide angle) at high temperatures were extensively used for this purpose and some selected results from thein situmeasurements are presented. In particular, the effect of boron doping in Co–Re–Cr alloys and the stability of the TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co–Re alloys, and their stability at the application temperature is critical for the long-term creep properties.
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Arbi K, Hoelzel M, Kuhn A, García-Alvarado F, Sanz J. Local structure and lithium mobility in intercalated Li3AlxTi2−x(PO4)3 NASICON type materials: a combined neutron diffraction and NMR study. Phys Chem Chem Phys 2014; 16:18397-405. [DOI: 10.1039/c4cp02938k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detection of twelve components in the 6Li MAS-NMR spectra of Li3Ti2(PO4)3 recorded at room temperature suggests the location of Li+ ions near different three-oxygen faces that define large M2 cavities. The occupation of M3 and M3′ sites deduced by the ND technique has been ascribed to the lower spatial resolution achieved in ND experiments.
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Affiliation(s)
- K. Arbi
- Instituto de Ciencia de Materiales de Madrid (CSIC)
- 28049 Cantoblanco, Spain
| | - M. Hoelzel
- Forschungsneutronenquelle Heinz-Maier-Leibnitz (FRM II)
- Technische Universität München
- D-85747 Garching, Germany
| | - A. Kuhn
- Departmento de Química
- Universidad CEU San Pablo Facultad de Farmacia
- Urb. Montepríncipe
- 28668 Boadilla del Monte, Spain
| | - F. García-Alvarado
- Departmento de Química
- Universidad CEU San Pablo Facultad de Farmacia
- Urb. Montepríncipe
- 28668 Boadilla del Monte, Spain
| | - J. Sanz
- Instituto de Ciencia de Materiales de Madrid (CSIC)
- 28049 Cantoblanco, Spain
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Arbi K, Hoelzel M, Kuhn A, García-Alvarado F, Sanz J. Structural Factors That Enhance Lithium Mobility in Fast-Ion Li1+xTi2–xAlx(PO4)3 (0 ≤ x ≤ 0.4) Conductors Investigated by Neutron Diffraction in the Temperature Range 100–500 K. Inorg Chem 2013; 52:9290-6. [DOI: 10.1021/ic400577v] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- K. Arbi
- Instituto de Ciencia de Materiales Madrid (CSIC), 28049 Cantoblanco,
Madrid, Spain
| | - M. Hoelzel
- Forschungsneutronenquelle
Heinz-Maier-Leibnitz (FRM II), Technische Universität München, Lichtenbergstrasse 1, D-85747 Garching,
Germany
| | - A. Kuhn
- Facultad de Farmacia,
Department of Chemistry, Urbanizacion Montepríncipe, Universidad CEU San Pablo, 28668 Boadilla del Monte,
Madrid, Spain
| | - F. García-Alvarado
- Facultad de Farmacia,
Department of Chemistry, Urbanizacion Montepríncipe, Universidad CEU San Pablo, 28668 Boadilla del Monte,
Madrid, Spain
| | - J. Sanz
- Instituto de Ciencia de Materiales Madrid (CSIC), 28049 Cantoblanco,
Madrid, Spain
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Park SH, Chucholowski C, Lara LB, Hoelzel M, Paulmann C. Investigation of a new willemite-type compound, (Li, Na, H)0.16Zn1.92SiO4. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.01.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Iturbe-Zabalo E, Igartua J, Faik A, Larrañaga A, Hoelzel M, Cuello G. Crystal structures and high-temperature phase-transitions in SrNdMRuO6 (M=Zn,Co,Mg,Ni) new double perovskites studied by symmetry-mode analysis. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gilles R, Siouris IM, Kockelmann W, Visser D, Katsavounis S, Walter JM, Hoelzel M, Brunelli M. Determination of phase compositions in ceramics from Gobi desert using complementary diffraction techniques. J Radioanal Nucl Chem 2012. [DOI: 10.1007/s10967-012-2325-6] [Citation(s) in RCA: 3] [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: 11/28/2022]
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Gilles R, Siouris IM, Visser D, Kockelmann W, Katsavounis S, Hoelzel M, Walter JM, Brunelli M. Characterization of ceramics from Inner Mongolia using complementary diffraction techniques. Acta Crystallogr A 2012. [DOI: 10.1107/s010876731209647x] [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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Pérez-Flores JC, Baehtz C, Hoelzel M, Kuhn A, García-Alvarado F. H2Ti6O13, a new protonated titanate prepared by Li+/H+ ion exchange: synthesis, crystal structure and electrochemical Li insertion properties. RSC Adv 2012. [DOI: 10.1039/c2ra01134d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pérez-Flores JC, Baehtz C, Hoelzel M, Kuhn A, García-Alvarado F. Full structural and electrochemical characterization of Li2Ti6O13 as anode for Li-ion batteries. Phys Chem Chem Phys 2012; 14:2892-9. [DOI: 10.1039/c2cp23741e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [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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Hoelzel M, Hinterstein M, Schmahl WW, Senyshyn A, Dolci F, Fuess H. Neutron diffraction on functional materials using special sample environments. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094013] [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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Arbi K, Sobrados I, Hoelzel M, Kuhn A, Garcia-Alvarado F, Sanz J. Ionic mobility in Nasicon-type LiMIV2(PO4)3 materials followed by 7Li NMR spectroscopy. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/opl.2011.705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractLithium mobility in LiM2(PO4)3 compounds, with M= Ge, Ti, Sn, Zr and Hf, has been investigated by 7Li Nuclear Magnetic Resonance (NMR) spectroscopy in the temperature range 100-500 K. From the analysis of 7Li NMR quadrupole interactions (CQ and η parameters), Li sites occupancy and exchange processes between structural sites have been studied. Below 250K, Li ions are preferentially located at M1 sites in rhombohedral phases, but occupy M12 sites in triclinic ones. At increasing temperatures, Li mobility has been deduced from spin-spin () and spin-lattice relaxation () rates. In this analysis, the presence of two relaxation mechanisms in plots has been associated with departures of conductivity from the Arrhenius behavior. At high temperatures, residence times at M12−T11−T11−T1 and M12 sites become similar and conductivity significantly increase. This superionic state can be achieved by enlarged order-disorder transformations in rhombohedral phases, or by sharp first order transitions in triclinic ones. Results described in the LiTi2(PO4)3 sample have been compared with those obtained in rhombohedral Li1+xTi2-xAlx(PO4)3 and LiTi2-xZrx(PO4)3 series showing respectively higher and lower conductivities. In the case of Li1.2Ti1.8Al0.2(PO4)3, displaying the highest reported conductivity, NMR results are discussed in relation with those obtained by Neutron Diffraction (ND) and Impedance Spectroscopy (IS). Diffusion coefficients determined by NMR Pulse Field Gradient (PFG) technique are similar to those deduced from Impedance Spectroscopy and NMR relaxation data.
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Šepelák V, Bergmann I, Feldhoff A, Litterst FJ, Becker KD, Cadogan JM, Hofmann M, Hoelzel M, Wang JL, Avdeev M, Campbell SJ. Mechanosynthesis of nanocrystalline MgFe2O4—neutron diffraction and Mössbauer spectroscopy. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s10751-010-0243-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Schmahl WW, Gollerthan S, Young ML, Xia X, Hasan M, Merkel C, Hoelzel M, Baruj A, Frenzel J, Eggeler G. Elastic and non-elastic response of shape memory alloys to stress fields. Acta Crystallogr A 2010. [DOI: 10.1107/s0108767310098867] [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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Zúñiga FJ, García-García FJ, Hoelzel M, Reller A. Al14Ba8La26.3Ru18Sr53.7O167: a variant of cubic perovskite with isolated RuO6units. Acta Crystallogr C 2010; 66:i50-4. [DOI: 10.1107/s0108270110013879] [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] [Received: 02/10/2010] [Accepted: 04/14/2010] [Indexed: 11/11/2022] Open
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Boysen H, Kaiser-Bischoff I, Lerch M, Berendts S, Börger A, Trots D, Hoelzel M, Senyshyn A. Structures and properties of variously doped Mayenite investigated by neutron and synchrotron powder diffraction. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zksu.2009.0047] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Komarek AC, Streltsov SV, Isobe M, Möller T, Hoelzel M, Senyshyn A, Trots D, Fernández-Díaz MT, Hansen T, Gotou H, Yagi T, Ueda Y, Anisimov VI, Grüninger M, Khomskii DI, Braden M. CaCrO3: an anomalous antiferromagnetic metallic oxide. Phys Rev Lett 2008; 101:167204. [PMID: 18999709 DOI: 10.1103/physrevlett.101.167204] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2008] [Revised: 05/07/2008] [Indexed: 05/27/2023]
Abstract
Combining infrared reflectivity, transport, susceptibility, and several diffraction techniques, we find compelling evidence that CaCrO3 is a rare case of a metallic and antiferromagnetic transition-metal oxide with a three-dimensional electronic structure. Local spin density approximation calculations correctly describe the metallic behavior as well as the anisotropic magnetic ordering pattern of C type: The high Cr valence state induces via sizable pd hybridization remarkably strong next-nearest-neighbor interactions stabilizing this ordering. The subtle balance of magnetic interactions gives rise to magnetoelastic coupling, explaining pronounced structural anomalies observed at the magnetic ordering transition.
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Affiliation(s)
- A C Komarek
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, Köln, Germany
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Martinez Meta NJ, Schweda E, Boysen H, Haug A, Chassé T, Hoelzel M. Zr50Sc12O43N50 and Zr3Sc4N8 – Synthesis, Neutron Powder Diffraction and Raman Spectroscopy. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200600397] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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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Senyshyn A, Vasylechko L, Boysen H, Ehrenberg H, Hoelzel M, Hansen T, Fuess H. Thermal expansion and atomic vibrations in CaWO 4studied by neutron and synchrotron powder diffraction. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306097662] [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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Gilles R, Hoelzel M, Schlapp M, Elf F, Krimmer B, Boysen H, Fuess H. First test measurements at the new structure powder diffractometer (SPODI) at the FRM-II. ACTA ACUST UNITED AC 2006. [DOI: 10.1524/zksu.2006.suppl_23.183] [Citation(s) in RCA: 14] [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: 11/24/2022]
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Rajevac V, Hoelzel M, Fuess H. Lattice dynamics in hydrogenated austenitic stainless steels Fe-25Cr-20Ni and Fe-18Cr-10Ni. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304094139] [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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Hoelzel M, Danilkin SA, Toebbens DM, Udovic TJ, Rameriz-Cuesta T, Rajevac V, Wipf H, Fuess H. Elastic and inelastic neutron scattering on hydrogenated austenitic stainless steels. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304095844] [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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Fuess H, Gilles R, Hoelzel M, Schlapp M, Krimmer B, Boysen H. The set-up of the structure powder diffractometer (SPODI) at the FRM-II. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304095510] [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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