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Larralde, A.L.; Ramos, C.P.; Arcondo, B.; Tufo, A.E.; Saragovi, C.; Sileo, E.E. "Structural properties and hyperfine characterization of Sn-substituted goethites" (2012) Materials Chemistry and Physics. 133(2-3):735-740
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Abstract:

Tin-doped goethites obtained by a simple method at ambient pressure and 70°C were characterized by inductively coupled plasma atomic emission spectrometry, scanning electron microscopy, Rietveld refinement of powder X-ray diffraction data, and 57Fe and 119Sn Mössbauer spectroscopy. The particles size and the length to width ratios decreased with tin-doping. Sn partially substituted the Fe(III) ions provoking unit cell expansion and increasing the crystallinity of the particles with enlarged domains that grow in the perpendicular and parallel directions to the anisotropic broadening (1 1 1) axis. Intermetallic E, E′ and DC distances also change although the variations are not monotonous, indicating different variations in the coordination polyhedron. In general, the Sn-substituted samples present larger intermetallic distances than pure goethite, and the greatest change is shown in the E′ distance which coincides with the c-parameter. 119Sn Mössbauer spectroscopy revealed that Sn(II) is incorporated as Sn(IV) in the samples. On the other hand, Fe(II) presence was not detected by 57Fe Mössbauer spectroscopy, suggesting the existence of vacancies in the Sn-doped samples. A lower magnetic coupling is also evidenced from the average magnetic hyperfine field values obtained as tin concentration increased. © 2012 Elsevier B.V. All rights reserved.

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Documento: Artículo
Título:Structural properties and hyperfine characterization of Sn-substituted goethites
Autor:Larralde, A.L.; Ramos, C.P.; Arcondo, B.; Tufo, A.E.; Saragovi, C.; Sileo, E.E.
Filiación:INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, Argentina
Departamento de Física de la Materia Condensada, GIyA - CAC - CNEA, Av. Gral. Paz 1499, (1650), San Martín, Bs. As., Argentina
Departamento de Física, Facultad de Ingeniería, Universidad de Buenos Aires, Av. Paseo Colón 850, (C1063ACV), Bs. As., Argentina
Palabras clave:Chemical synthesis; Mössbauer spectroscopy; Oxides; Rietveld analysis; Ambient pressures; Anisotropic broadening; Chemical synthesis; Coordination polyhedra; Crystallinities; Hyperfine characterization; Inductively coupled plasma atomic emission spectrometry; Length-to-width ratio; Magnetic hyperfine field; Particles sizes; Powder X ray diffraction; Rietveld; SIMPLE method; Sn-doped; Ssbauer spectroscopies; Unit cell expansion; Atomic emission spectroscopy; Iron compounds; Magnetic couplings; Molybdenum oxide; Oxides; Rietveld analysis; Rietveld refinement; Scanning electron microscopy; Tin oxides; Tinning; X ray diffraction; Tin
Año:2012
Volumen:133
Número:2-3
Página de inicio:735
Página de fin:740
DOI: http://dx.doi.org/10.1016/j.matchemphys.2012.01.075
Título revista:Materials Chemistry and Physics
Título revista abreviado:Mater Chem Phys
ISSN:02540584
CODEN:MCHPD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02540584_v133_n2-3_p735_Larralde

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Citas:

---------- APA ----------
Larralde, A.L., Ramos, C.P., Arcondo, B., Tufo, A.E., Saragovi, C. & Sileo, E.E. (2012) . Structural properties and hyperfine characterization of Sn-substituted goethites. Materials Chemistry and Physics, 133(2-3), 735-740.
http://dx.doi.org/10.1016/j.matchemphys.2012.01.075
---------- CHICAGO ----------
Larralde, A.L., Ramos, C.P., Arcondo, B., Tufo, A.E., Saragovi, C., Sileo, E.E. "Structural properties and hyperfine characterization of Sn-substituted goethites" . Materials Chemistry and Physics 133, no. 2-3 (2012) : 735-740.
http://dx.doi.org/10.1016/j.matchemphys.2012.01.075
---------- MLA ----------
Larralde, A.L., Ramos, C.P., Arcondo, B., Tufo, A.E., Saragovi, C., Sileo, E.E. "Structural properties and hyperfine characterization of Sn-substituted goethites" . Materials Chemistry and Physics, vol. 133, no. 2-3, 2012, pp. 735-740.
http://dx.doi.org/10.1016/j.matchemphys.2012.01.075
---------- VANCOUVER ----------
Larralde, A.L., Ramos, C.P., Arcondo, B., Tufo, A.E., Saragovi, C., Sileo, E.E. Structural properties and hyperfine characterization of Sn-substituted goethites. Mater Chem Phys. 2012;133(2-3):735-740.
http://dx.doi.org/10.1016/j.matchemphys.2012.01.075