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Showing 1 to 11 of 11 for “"vanadates"”.
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Electronic structure of strongly correlated low-dimensional spin ½ systems: cuprates and vanadates
… we presented the calculations for three novel vanadates: MgVO3, Sb2O2VO3 and VOMoO4. The tight-binding parameters and the exchange integrals were computed. The magnesium and antimony vanadates appeared to be spin-½ one-dimensional systems, the latter having much stronger one-dimensional …
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Preparation, structural characterization and properties of Oxo-vanadates-IV with unusual magnetic states
Within the scope of this work temperature dependences of both novel and known low-dimensional S=1/2 vanadium oxides have been studied at low temperatures. The basic structural unit of all investigated compounds is the V4+O5 pyramid arranged in layers. Besides structural characterisation alternative …
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Petroleum coke slags: characterization and dissolution
… coke slags including oxides, silicates. vanadates, sulfate. sulfides and alloys. The reduced slags are rich in V₂>0₃ with silicates and minor amounts of sulfides and native metals whereas the oxidized slags are composed of V₂>0₄, nickel aluminum spinels. various vanadates and glass. …
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Spin-Phonon-Kopplung und Spin-Anregungen in quasi-eindimensionalen Spinsystemen
… a fascinating field of copper oxide compounds, vanadates, manganates and nikelates opened up. These compounds show effects of strong electronic correlations and in particular magnetism in low dimensions. Magnetism in low dimensions has a history reaching back to the origin of quantum mechanics. …
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The crystal chemistry of MTO₄ compounds with the zicron, scheelite, and monazite structure types
… include but are not limited to the lanthanide vanadates and phosphates, the alkali earth molybdates and tungstates, and KTcO₄. The structural parameters studied included bond lengths, bond angles, polyhedral volumes, unit cell edge lengths, tetrahedral quadratic elongations and atomic …
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Elektronen-Energieverlustspektroskopie von quasi-eindimensionalen Kupraten und Vanadaten
… structure of quasi one-dimensional cuprates and vanadates. Electron energy-loss spectroscopy in transmission was employed to measure the momentum-dependent loss function of Li2CuO2, CuGeO3, V2O5 and NaV2O5. The comparison between the experimental data and the results from bandstructure as well as …
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Synthesis, Structure and Properties of Mixed Metal Oxides: From Pyrochlores to Fluorites
… and characterisation of new doped bismuth vanadates with formula Bi19-xMxV2O33.5-x/2 (M = Ca2+ or Sr2+), also excellent oxide ion conductors, is reported. Overall Conclusions and Suggestions for Future Work: This briefly reviews the conclusions and makes suggestions for further work.
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An Experimental and Theoretical Investigation into Mg-ion Battery Electrodes using Nuclear Magnetic Resonance Spectroscopy
… techniques is then applied to two of magnesium vanadates for high-voltage cathode applications. In particular, DFT-based thermodynamic energies are used to rationally design the synthetic steps leading to the said vanadate materials, followed by DFT prediction of the migration barriers. The …
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Raman scattering studies of spinels CoV2O4 and MnV2O4
… low temperatures (T = 7 K), unlike other spinel vanadates. The absence of a structural distortion in orbitally degenerate CoV2O4 supports the previous speculation that the t2g valence electrons in CoV2O4 are not localized. In our pressure-dependent studies, we discover a pressure-induced …
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Strukturelle und magnetische Eigenschaften der Cu-Divanadate sowie verwandter, niedrigdimensionaler Verbindungen
… (x = 0; 1; 1,25 and 1,5). In these vanadates the magnetic Cu2+ ions (S=1/2) forms different one dimensional chains and two dimensional networks. Thus, the research was motivated by the search of new low-dimensional spin systems and the research of the influence of different …