نتایج جستجو برای: neutron diffraction

تعداد نتایج: 106724  

2009
J. Repper M. Hofmann W. Petry E. Werner

Four matrix-phase crystallographic directions of IN718 are investigated by in-situ tensile tests using neutron diffraction. The elastic diffraction constants for all directions measured are compared to theoretical values calculated by the Kröner model. The differences between the microscopic and the macroscopic material response are given. The accumulation of microstrains in the different cryst...

Journal: :Dalton transactions 2014
Cyrille Galven Denis Mounier Thierry Pagnier Emmanuelle Suard Françoise Le Berre Marie-Pierre Crosnier-Lopez

The present work concerns the thermal structural characterization of the acentric Ruddlesden-Popper LiHSrTa2O7. A previous study, performed with powder neutron diffraction data, has revealed that at room temperature, LiHSrTa2O7 crystallizes in the Ama2 space group and that the acentric character is mainly due to the unequal distribution of the Li(+) and H(+) cations on their sites. In this new ...

Journal: :Physical chemistry chemical physics : PCCP 2011
Andrew S Powell Zlatka Stoeva Ronald I Smith Duncan H Gregory Jeremy J Titman

A combined NMR and neutron diffraction study has been carried out on three Li(3-x-y)Cu(x)N materials with x=0.17, x=0.29 and x=0.36. Neutron diffraction indicates that the samples retain the P6/mmm space group of the parent Li(3)N with Cu located only on Li(1) sites. The lattice parameters vary smoothly with x in a similar fashion to Li(3-x-y)Ni(x)N, but the Li(2) vacancy concentration for the ...

Journal: :Powder Diffraction 2017

Journal: :Dalton transactions 2016
Thomas K Ellis Gordon J Kearley Ross O Piltz Upali A Jayasooriya John A Stride

Tris(acetylacteonate) iron(iii) is a relatively ubiquitous mononuclear inorganic coordination complex. The bidentate nature of the three acetylacteonate ligands coordinating around a single centre inevitably leads to structural isomeric forms, however whether or not this relates to chirality in the solid state has been questioned in the literature. Variable temperature neutron diffraction data ...

Journal: :Journal of the American Chemical Society 2011
Stephen A FitzGerald Brian Burkholder Michael Friedman Jesse B Hopkins Christopher J Pierce Jennifer M Schloss Benjamin Thompson Jesse L C Rowsell

Diffuse reflectance infrared (IR) spectroscopy performed over a wide temperature range (35-298 K) is used to study the dynamics of H(2) adsorbed within the isostructural metal-organic frameworks M(2)L (M = Mg, Mn, Co, Ni and Zn; L = 2,5-dioxidobenzene-1,4-dicarboxylate) referred to as MOF-74 and CPO-27. Spectra collected at H(2) concentrations ranging from 0.1 to 3.0 H(2) per metal cation revea...

Journal: :Faraday discussions 2013
Philip E Mason George W Neilson David L Price Marie-Louise Saboungi John W Brady

The method of intramolecular coordination number concentration invariance (ICNCI) is used on neutron diffraction with isotopic substitution (NDIS) measurements of aqueous solutions to separate the intra- and intermolecular contributions to the total intensities. Molecular dynamics simulations of corresponding systems are then used to interpret the ICNCI function. It is found that the ICNCI func...

2006
N. V. Baranov A. A. Yermakov A. N. Pirogov A. V. Proshkin S. N. Gvasaliya A. Podlesnyak

N. V. Baranov,1,2,* A. A. Yermakov,1,2 A. N. Pirogov,1 A. V. Proshkin,2 S. N. Gvasaliya,3 and A. Podlesnyak3,4 1Institute for Metal Physics, Ekaterinburg 620219, Russia 2Institute of Physics and Applied Mathematics, Ural State University, 620083 Ekaterinburg, Russia 3Laboratory for Neutron Scattering, ETHZ & Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland 4Hahn-Meitner-Institut, SF-2,...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2011
M Parra-Borderías F Bartolomé J A Rodríguez Velamazán J Bartolomé

The evolution of the crystal structure and magnetic properties with Fe content in NdFe(x)Ga(1 - x)O(3) has been studied by magnetization, ac-susceptibility, x-ray and neutron scattering techniques for x ≥ 0.2 in order to determine the phase diagram of the series. X-ray diffraction shows that the crystallographic structure of NdFe(x)Ga(1 - x)O(3) can be described in the space group Pbnm for all ...

Journal: :The Journal of chemical physics 2013
Per Sillrén Jan Swenson Johan Mattsson Daniel Bowron Aleksandar Matic

The structure of liquid 1-propanol is investigated as a function of temperature using neutron diffraction together with Empirical Potential Structure Refinement modelling. The combined diffraction and computer modelling analysis demonstrates that propanol molecules form hydrogen bonded clusters with a relatively wide size distribution, which broadens at lower temperatures. We find that the clus...

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