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Article: RELEASE OF Mg AND Fe FROM THE OCTAHEDRAL SHEETS DURING THE TRANSFORMATION OF MONTMORILLONITE INTO KAOLINITE

TitleRELEASE OF Mg AND Fe FROM THE OCTAHEDRAL SHEETS DURING THE TRANSFORMATION OF MONTMORILLONITE INTO KAOLINITE
Authors
KeywordsFe
Kaolinite
Mg
Montmorillonite
Octahedral sheet
Release
Issue Date2021
Citation
Clays and Clay Minerals, 2021, v. 69, n. 4, p. 453-462 How to Cite?
AbstractIsomorphous substitutions of Mg and Fe for Al generally appear in the octahedral sheets of montmorillonite, whereas they are infrequent in kaolinite. Therefore, the release of Mg and Fe from the octahedral sheets probably happens during the transformation of montmorillonite into kaolinite, which could affect the migration of Mg and Fe from clay minerals into surrounding environments. The objective of the current study was to investigate the relationship between Mg and Fe release during the transformation of montmorillonite into kaolinite. The results showed that the d060 value of clay minerals decreased slightly, and the intensities of both the AlMg–OH and AlFe–OH bending vibrations also decreased gradually. In addition, the (Mg+Fe)/Al (major octahedral ions) atomic ratio of kaolinite was lower than that of montmorillonite, especially in identical hydrothermal products. These results indicated that Mg and Fe ions were released progressively from the octahedral sheets during the transformation of montmorillonite into kaolinite. Moreover, the changed relative concentrations of Mg and Fe ions in the supernatant solutions after hydrothermal reactions suggested a random distribution of Mg and/or Fe in the octahedral sheets of the montmorillonite. These results improve understanding of the release relationship between Mg and Fe during clay mineral evolution and of the distribution of these two ions in the octahedral sheets, as well as the chemical composition of clay minerals as an indicator of geological environments.
Persistent Identifierhttp://hdl.handle.net/10722/316602
ISSN
2023 Impact Factor: 2.0
2023 SCImago Journal Rankings: 0.367
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Shangying-
dc.contributor.authorTao, Qi-
dc.contributor.authorMa, Lingya-
dc.contributor.authorZhang, Chaoqun-
dc.contributor.authorYang, Yixuan-
dc.contributor.authorDu, Peixin-
dc.contributor.authorLiu, Jiacheng-
dc.contributor.authorZhu, Jianxi-
dc.date.accessioned2022-09-14T11:40:51Z-
dc.date.available2022-09-14T11:40:51Z-
dc.date.issued2021-
dc.identifier.citationClays and Clay Minerals, 2021, v. 69, n. 4, p. 453-462-
dc.identifier.issn0009-8604-
dc.identifier.urihttp://hdl.handle.net/10722/316602-
dc.description.abstractIsomorphous substitutions of Mg and Fe for Al generally appear in the octahedral sheets of montmorillonite, whereas they are infrequent in kaolinite. Therefore, the release of Mg and Fe from the octahedral sheets probably happens during the transformation of montmorillonite into kaolinite, which could affect the migration of Mg and Fe from clay minerals into surrounding environments. The objective of the current study was to investigate the relationship between Mg and Fe release during the transformation of montmorillonite into kaolinite. The results showed that the d060 value of clay minerals decreased slightly, and the intensities of both the AlMg–OH and AlFe–OH bending vibrations also decreased gradually. In addition, the (Mg+Fe)/Al (major octahedral ions) atomic ratio of kaolinite was lower than that of montmorillonite, especially in identical hydrothermal products. These results indicated that Mg and Fe ions were released progressively from the octahedral sheets during the transformation of montmorillonite into kaolinite. Moreover, the changed relative concentrations of Mg and Fe ions in the supernatant solutions after hydrothermal reactions suggested a random distribution of Mg and/or Fe in the octahedral sheets of the montmorillonite. These results improve understanding of the release relationship between Mg and Fe during clay mineral evolution and of the distribution of these two ions in the octahedral sheets, as well as the chemical composition of clay minerals as an indicator of geological environments.-
dc.languageeng-
dc.relation.ispartofClays and Clay Minerals-
dc.subjectFe-
dc.subjectKaolinite-
dc.subjectMg-
dc.subjectMontmorillonite-
dc.subjectOctahedral sheet-
dc.subjectRelease-
dc.titleRELEASE OF Mg AND Fe FROM THE OCTAHEDRAL SHEETS DURING THE TRANSFORMATION OF MONTMORILLONITE INTO KAOLINITE-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s42860-021-00138-5-
dc.identifier.scopuseid_2-s2.0-85114665422-
dc.identifier.volume69-
dc.identifier.issue4-
dc.identifier.spage453-
dc.identifier.epage462-
dc.identifier.eissn1552-8367-
dc.identifier.isiWOS:000694777400001-

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