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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todo:paper_08857156_v18_n1_p50_Sileo2023-10-03T15:40:46Z Structural study of a series of synthetic goethites obtained in aqueous solutions containing cadmium(II) ions Sileo, E.E. Solís, P.S. Paiva-Santos, C.O. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Sileo, E.E. Solís, P.S. Paiva-Santos, C.O. 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. |
| format |
JOUR |
| author |
Sileo, E.E. Solís, P.S. Paiva-Santos, C.O. |
| author_facet |
Sileo, E.E. Solís, P.S. Paiva-Santos, C.O. |
| author_sort |
Sileo, E.E. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_08857156_v18_n1_p50_Sileo |
| work_keys_str_mv |
AT sileoee structuralstudyofaseriesofsyntheticgoethitesobtainedinaqueoussolutionscontainingcadmiumiiions AT solisps structuralstudyofaseriesofsyntheticgoethitesobtainedinaqueoussolutionscontainingcadmiumiiions AT paivasantosco structuralstudyofaseriesofsyntheticgoethitesobtainedinaqueoussolutionscontainingcadmiumiiions |
| _version_ |
1807316495690104832 |