Search results for "lanthanum"
showing 10 items of 78 documents
CCDC 1826455: Experimental Crystal Structure Determination
2018
Related Article: Marta Mon, Rosaria Bruno, Rosangela Elliani, Antonio Tagarelli, Xiaoni Qu, Sanping Chen, Jesús Ferrando-Soria, Donatella Armentano, Emilio Pardo|2018|Inorg.Chem.|57|13895|doi:10.1021/acs.inorgchem.8b02409
CCDC 1579865: Experimental Crystal Structure Determination
2018
Related Article: Samia Benmansour, Antonio Hernández Paredes, Carlos J. Gómez García|2018|J.Coord.Chem.|71|845|doi:10.1080/00958972.2017.1420182
CCDC 1833441: Experimental Crystal Structure Determination
2019
Related Article: Antti Tiihonen, Manu Lahtinen|2019|CrystEngComm|21|2286|doi:10.1039/C8CE01015C
CCDC 1400956: Experimental Crystal Structure Determination
2016
Related Article: Roberto Puentes, Julia Torres, Carlos Kremer, Joan Cano, Francesc Lloret, Davide Capucci, Alessia Bacchi|2016|Dalton Trans.|45|5356|doi:10.1039/C5DT05060J
CCDC 1419401: Experimental Crystal Structure Determination
2015
Related Article: Sudeshna Saha, Partha P. Jana, Carlos J. Gómez-García, Klaus Harms, Hari Pada Nayek|2016|Polyhedron|104|58|doi:10.1016/j.poly.2015.11.035
CCDC 1585318: Experimental Crystal Structure Determination
2018
Related Article: Maria-Gabriela Alexandru, Diana Visinescu, Sergiu Shova, Willian X. C. Oliveira, Francesc Lloret, Miguel Julve|2018|Dalton Trans.|47|6005|doi:10.1039/C8DT00895G
An X-ray powder diffraction study of lanthanum–strontium ferromanganites
2001
Abstract Various lanthanum–strontium ferromanganites (La 1− x Sr x )(Mn 1− y Fe y )O 3± δ (LSMF) with x =0.2, 0.5 and 0.7 and y =0.2, 0.5 and 0.8 were prepared by a glycine–nitrate combustion route and conditioned into two different oxygenation states which are likely to be encountered in cathode materials for solid oxide fuel cells (SOFC). Crystal symmetries for both the low and the fully oxygenated states were determined by X-ray diffractometry. Most perovskite compositions crystallized in either cubic or rhombohedral symmetry with the exception of La 0.5 Sr 0.5 Mn 0.2 Fe 0.8 O 3± δ , where a transition from rhombohedral to cubic occurred in going from the full to the low oxygenation stat…
A comparative study of the surface and bulk properties of lanthanum-strontium-manganese oxides La1âxSrxMnO3±δ as a function of Sr-content, oxygen…
1999
Abstract The properties of the perovskite-type La 1− x Sr x MnO 3± δ oxides (0≤ x ≤1) are related to the reversible redox reaction of manganese ions Mn 3+ ↔Mn 4+ . This reaction plays an essential role both in the interfacial transfers and transport properties and depends on relative cation concentrations and experimental conditions. In this paper we present experimental investigations aiming to determine, to compare and to control some of the surface and bulk properties of these oxides. The bulk and surface Mn 4+ contents were investigated by thermogravimetry analysis (TGA) in hydrogen and X-ray photo-electron spectroscopy (XPS) respectively. With a finely divided La 0.8 Sr 0.2 MnO 3 powde…
Surface modification of luminescent lanthanide phosphate nanorods with cationic "Quat-primer" polymers.
2011
"Quat-primer" polymers bearing cationic groups were investigated as a surface modifier for Tb-doped cerium phosphate green-emitting fluorescent nanorods (NRs). The NRs were synthesized by a microwave process without using any complex agents or ligands and were characterized with different analytical tools such as X-ray diffraction, transmission electron microscopy, and fluorescence spectroscopy. Poly(ethyleneimine) partially quarternized with glycidyltrimethylammonium chloride was synthesized separately and characterized in detail. (1)H and (13)C NMR spectroscopic studies revealed that the quaternary ammonium group was covalently attached to the polymer. UV-vis spectroscopy was used to exam…
X-ray powder diffraction study of the stability of solid solutions in LaO(Cl1−xBrx)
1997
Abstract The formation of solid solutions in the LaO(Cl 1− x Br x ) series was studied by X-ray powder diffraction (XPD), Rietveld profile refinement and bond valence calculations. The LaO(Cl 1− x Br x ) (0 ≤ x ≤ 1, step 0.2, and x = 0.5) powder samples were prepared by the solid state reaction between La 2 O 3 and a mixture of ammonium chloride and bromide. The X-ray powder diffraction patterns were collected at room temperature between 5 and 125° in 2Θ using Cu K α 1 radiation (λ = 1.5406 A). The XPD data between 20 and 90° were analyzed with the DBWS-9006PC Rietveld profile refinement program. All the LaO(Cl 1− x Br x ) phases studied crystallize in the tetragonal PbFCl-type structure wi…