| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Grivel, Jean-Claude Roger
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2023Production of magnesium diboride wires
- 2021Millimeter-Wave Response of All Metal-Organic Deposited YBCO Transition Edge Bolometercitations
- 2019Electrical, magnetic and magnetotransport properties of Na and Mo doped Ca3Co4O9 materialscitations
- 2018Influence of iridium doping in MgB2 superconducting wirescitations
- 2018Two level undercut-profile substrate-based filamentary coated conductors produced using metal organic chemical vapor depositioncitations
- 2018New insights into the thermal behavior and decomposition of sodium propionatecitations
- 2018Deposition of highly oriented (K,Na)NbO3 films on flexible metal substratescitations
- 2017Thickness-Dependent Properties of YBCO Films Grown on GZO/CLO-Buffered NiW Substratescitations
- 2017Pulsed Laser Deposition of YBa2Cu3Ox with Scanning Beam: Target to Substrate Composition Transfer and Film Structurecitations
- 2016Preparation and characterization of Sc doped MgB2 wirescitations
- 2016Characterization of YBa2Cu3O7−δ Films With Various Porous Structures Grown by Metalorganic Decomposition Routecitations
- 2016All Metal Organic Deposited High-Tc Superconducting Transition Edge Bolometer on Yttria-Stabilized Zirconia Substratecitations
- 2016Superconducting Dy1-x(Gd,Yb)xBa2Cu3O7-δ thin films made by Chemical Solution Depositioncitations
- 2016Effect of Platinum Group Metal Doping in Magnesium Diboride Wirescitations
- 2015Influence of SrF2 on the Formation, Microstructure and Critical Temperature of (Bi,Pb)2Sr2Ca2Cu3O10 Polycrystalline Samplescitations
- 2014Comparative characterization of Cu–Ni substrates for coated conductorscitations
- 2014Manufacture of Bi-cuprate thin films on MgO single crystal substrates by chemical solution deposition
- 2014The crystal structure of paramagnetic copper(ii) oxalate (CuC2O4):citations
- 2013Microstructure, texture and magnetic properties of Ni-Cu-W substrates for coated conductorscitations
- 2013Yttrium-enriched YBa2Cu3Ox thin films for coated conductors fabricated by pulsed laser depositioncitations
- 2013Preparation and characterization of Bi2Sr2CaCu2O8+δ thin films on MgO single crystal substrates by chemical solution depositioncitations
- 2012Subsolidus phase relations of the SrO–WO3–CuO system at 800 °C in aircitations
- 2012Critical current density measurement of thin films by AC susceptibility based on the penetration parameter hcitations
- 2012Development of Strontium Titanate Thin films on Technical Substrates for Superconducting Coated Conductors
- 2012Cube-textured metal substrates for reel-to-reel processing of coated conductors
- 2010Influence of the initial Bi2223 phase content on microstructure development in Bi2223/Ag tapescitations
- 2010Anisotropy of the critical current in MgB2 tapes made of high energy milled precursor powdercitations
- 2002Preparation of (Bi, Pb)-2223/Ag tapes by high temperature sintering and post-annealing processcitations
Places of action
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article
The crystal structure of paramagnetic copper(ii) oxalate (CuC2O4):
Abstract
Synthetic copper(ii) oxalate, CuC<sub>2</sub>O<sub>4</sub>, was obtained in a precipitation reaction between a copper(ii) solution and an aqueous solution of oxalic acid. The product was identified from its conventional X-ray powder patterns which match that of the copper mineral Moolooite reported to have the composition CuC<sub>2</sub>O<sub>4</sub>·0.44H<sub>2</sub>O. Time resolved in situ investigations of the thermal decomposition of copper(ii) oxalate using synchrotron X-ray powder diffraction showed that in air the compound converts to Cu<sub>2</sub>O at 215 °C and oxidizes to CuO at 345 °C. Thermo gravimetric analysis performed in an inert Ar-gas reveals that the material contains no crystal water and reduces to pure Cu at 295 °C. Magnetic susceptibility measurements in the temperature range from 2 K to 300 K show intriguing paramagnetic behaviour with no sign of magnetic order down to 2 K. A crystal structure investigation is made based on powder diffraction data using one neutron diffraction pattern obtained at 5 K (λ = 1.5949(1) Å) combined with one conventional and two synchrotron X-ray diffraction patterns obtained at ambient temperature using λ = 1.54056, 1.0981 and λ = 0.50483(1) Å, respectively. Based on the X-ray synchrotron data the resulting crystal structure is described in the monoclinic space group P2<sub>1</sub>/c (#14) in the P12<sub>1</sub>/n1 setting with unit cell parameters a = 5.9598(1) Å, b = 5.6089(1) Å, c = 5.1138 (1) Å, β = 115.320(1)°. The composition is CuC<sub>2</sub>O<sub>4</sub> with atomic coordinates determined by FullProf refinement of the neutron diffraction data. The crystal structure consists of a random stacking of CuC<sub>2</sub>O<sub>4</sub> micro-crystallites where half the Cu-atoms are placed at (2a) and the other half at (2b) positions with the corresponding oxalate molecules centred around the corresponding (2b) and (2a) site positions, respectively. The diffraction patterns obtained for both kinds of radiation show considerable broadening of several Bragg peaks caused by highly anisotropic microstructural size and strain effects. In contrast to the water reported to be present in Moolooite, neither thermogravimetric nor the in situ thermal decomposition investigations and crystal structure analysis of the neutron diffraction data revealed any trace of water. An appendix contains details about the profile parameters for the diffractometers used at the European Synchrotron Radiation Facility and the Institute Max von Laue-Paul Langevin.