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INCORPORATION OF Mo6+ IN FERRIHYDRITE, GOETHITE, AND HEMATITE

Görn, Marcel G.; Bolanz, Ralph M.; Parry, Stephen; Göttlicher, Jörg 1; Steininger, Ralph 1; Majzlan, Juraj
1 Institut für Photonenforschung und Synchrotronstrahlung (IPS), Karlsruher Institut für Technologie (KIT)

Abstract:

Among all iron oxides, hematite (α-Fe2O3), goethite (α-FeOOH), and ferrihydrite (FeOOH⋅nH2O) are the most common mineral species. While immobilization of Mo6+ by surface adsorption on ferric oxides has been studied extensively, the mechanisms of incorporation in their structure have been researched little. The objective of this study was to investigate the relation between Mo content and its structural incorporation in hematite, goethite, and six-line ferrihydrite by a combination of X-ray absorption spectroscopy (XAS), powder X-ray diffraction (pXRD), and inductively-coupled plasma optical emission spectrometry (ICP-OES). Synthesized in the presence of Mo, the hematite, goethite, and six-line ferrihydrite phases incorporated up to 8.52, 0.03, and 17.49 wt. % Mo, respectively. For hematite and goethite, pXRD analyses did not indicate the presence of separate Mo phases. Refined unit-cell parameters correlated with increasing Mo concentration in hematite and goethite. The unit-cell parameters indicated an increase in structural disorder within both phases and, therefore, supported the structural incorporation of Mo in hematite and goethite. ... mehr

Zugehörige Institution(en) am KIT Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0009-8604, 1552-8367
KITopen-ID: 1000133367
HGF-Programm 56.12.11 (POF IV, LK 01) Materials - Quantum, Complex and Functional
Erschienen in Clays and clay minerals
Verlag Clay Minerals Society
Band 69
Seiten 188–204
Vorab online veröffentlicht am 07.05.2021
Nachgewiesen in OpenAlex
Scopus
Dimensions
Web of Science

Verlagsausgabe §
DOI: 10.5445/IR/1000133367
Veröffentlicht am 28.05.2021
Originalveröffentlichung
DOI: 10.1007/s42860-021-00116-x
Scopus
Zitationen: 11
Web of Science
Zitationen: 11
Dimensions
Zitationen: 11
Seitenaufrufe: 203
seit 30.05.2021
Downloads: 157
seit 30.05.2021
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