Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions

The capacity of goethite for CdII substitution has been explored in a series of synthetic samples prepared from FeIII and CdII nitrate solutions aged 21 days in alkaline media. The total metal content ([Fe] + [Cd]) was 0.071 M in all preparations. The samples have been characterized by chemical and...

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Detalles Bibliográficos
Publicado:	2003
Materias:	Cadmium Rietveld analysis Substituted goethite Substituted hematite X-ray powder diffraction Characterization Crystalline materials Nitrates Solutions X ray powder diffraction Iron compounds
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08857156_v18_n1_p50_Sileo http://hdl.handle.net/20.500.12110/paper_08857156_v18_n1_p50_Sileo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08857156_v18_n1_p50_Sileo
record_format	dspace
spelling	paper:paper_08857156_v18_n1_p50_Sileo2023-06-08T15:46:43Z Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions Cadmium Rietveld analysis Substituted goethite Substituted hematite X-ray powder diffraction Rietveld analysis Cadmium Characterization Crystalline materials Nitrates Solutions X ray powder diffraction Iron compounds The capacity of goethite for CdII substitution has been explored in a series of synthetic samples prepared from FeIII and CdII nitrate solutions aged 21 days in alkaline media. The total metal content ([Fe] + [Cd]) was 0.071 M in all preparations. The samples have been characterized by chemical and X-ray diffraction analysis; the morphology of the solids is described. The cell parameters for all samples were obtained by the Rietveld fits to the X-ray diffraction data. Refined structures show that for samples prepared at the final molar ratio μCd≤5.50 (expressed as μCd= 100×[Cd]/[Cd] + [Fe]), a (Cd, Fe)-goethite is the only crystalline product. In these samples, the unit cell parameters increased as a function of Cd concentration, indicating Cd incorporation in the structural frame. At the preparative ratio, μCd=7.03, the incorporation of Cd in the goethite structure is drastically reduced and a probable Cd-substituted hematite is formed together with the Fe,Cd-goethite. © 2003 International Centre for Diffraction Data. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08857156_v18_n1_p50_Sileo http://hdl.handle.net/20.500.12110/paper_08857156_v18_n1_p50_Sileo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cadmium Rietveld analysis Substituted goethite Substituted hematite X-ray powder diffraction Rietveld analysis Cadmium Characterization Crystalline materials Nitrates Solutions X ray powder diffraction Iron compounds
spellingShingle	Cadmium Rietveld analysis Substituted goethite Substituted hematite X-ray powder diffraction Rietveld analysis Cadmium Characterization Crystalline materials Nitrates Solutions X ray powder diffraction Iron compounds Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
topic_facet	Cadmium Rietveld analysis Substituted goethite Substituted hematite X-ray powder diffraction Rietveld analysis Cadmium Characterization Crystalline materials Nitrates Solutions X ray powder diffraction Iron compounds
description	The capacity of goethite for CdII substitution has been explored in a series of synthetic samples prepared from FeIII and CdII nitrate solutions aged 21 days in alkaline media. The total metal content ([Fe] + [Cd]) was 0.071 M in all preparations. The samples have been characterized by chemical and X-ray diffraction analysis; the morphology of the solids is described. The cell parameters for all samples were obtained by the Rietveld fits to the X-ray diffraction data. Refined structures show that for samples prepared at the final molar ratio μCd≤5.50 (expressed as μCd= 100×[Cd]/[Cd] + [Fe]), a (Cd, Fe)-goethite is the only crystalline product. In these samples, the unit cell parameters increased as a function of Cd concentration, indicating Cd incorporation in the structural frame. At the preparative ratio, μCd=7.03, the incorporation of Cd in the goethite structure is drastically reduced and a probable Cd-substituted hematite is formed together with the Fe,Cd-goethite. © 2003 International Centre for Diffraction Data.
title	Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
title_short	Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
title_full	Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
title_fullStr	Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
title_full_unstemmed	Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions
title_sort	structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(ii) ions
publishDate	2003
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08857156_v18_n1_p50_Sileo http://hdl.handle.net/20.500.12110/paper_08857156_v18_n1_p50_Sileo
_version_	1768545234754469888

Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions

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