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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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Warner, Terence Edwin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2020On the synthesis and structure of the copper-molybdenum oxide bronzes
- 2019Self-Propagating High-Temperature Synthesis of Titanium Carbidecitations
- 2016The effect of trace amounts of copper on the microstructure, stability and oxidation of macroporous silicon carbidecitations
- 2016The effect of trace amounts of copper on the microstructure, stability and oxidation of macroporous silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2015The role of Aluminium in the synthesis of Mesoporous 4H Silicon Carbide
- 2015The role of Aluminium in the synthesis of Mesoporous 4H Silicon Carbide
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article
On the synthesis and structure of the copper-molybdenum oxide bronzes
Abstract
<p>Cu<sub>2</sub>Mo<sub>10</sub>O<sub>30</sub> was prepared as a monophasic material comprising dark blue platy crystals by reacting Cu with MoO<sub>3</sub> under argon at 550 °C. Single-crystal X-ray diffractometry showed that Cu<sub>2</sub>Mo<sub>10</sub>O<sub>30</sub> is a stoichiometric compound that crystallizes with a monoclinic (C2/c) cell: a = 16.6359(6); b = 9.3112(3); c = 27.1597(9) Å; β = 102.621(3)° (Z = 8). Electron paramagnetic resonance spectroscopy revealed that Cu<sub>2</sub>Mo<sub>10</sub>O<sub>30</sub> displays mixed-valency; (Cu<sup>I</sup> <sub>2−x</sub>Cu<sup>II</sup> <sub>x</sub>)(Mo<sup>V</sup> <sub>2+x</sub>Mo<sup>VI</sup> <sub>8−x</sub>)O<sub>30</sub> (0 ≪ x ≤ 2). Differential scanning calorimetry and in situ high-temperature powder X-ray diffractometry showed that Cu<sub>2</sub>Mo<sub>10</sub>O<sub>30</sub> decomposes ≳550 °C under an inert atmosphere. Dark blue acicular crystals of CuMo<sub>9</sub>O<sub>26</sub> were discovered as a side-product in materials prepared inside evacuated glass ampoules at 500 °C. Single-crystal X-ray diffractometry showed these to crystallize with an orthorhombic (Pmmn) cell: a = 3.74190(10); b = 26.4941(4); c = 9.15300(10) Å; (Z = 2). Rietveld refinement of the powder X-ray diffraction data for these materials revealed Cu<sub>2</sub>Mo<sub>10</sub>O<sub>30</sub> with minor CuMo<sub>9</sub>O<sub>26</sub> and ‘Cu<sub>0.1</sub>MoO<sub>3</sub>’.</p>