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Hydrothermal synthesis of dioctahedral smectites: The Al-Fe3+chemical series. Part II: crystal-chemistry
journal contribution
posted on 2015-02-01, 00:00 authored by S Petit, A Decarreau, Will GatesWill Gates, P Andrieux, O GraubyThe crystal-chemistry of a series of synthetic Al-Fe3+ smectites was studied in detail using near and mid infrared spectroscopy. Chemical and NIR data indicated a quite complete range of octahedral Al for Fe3+ substitution, and therefore, the solid-solution between beidellite and nontronite end-members was continuous and complete. The wavenumbers of several infrared absorption bands were correlated with the chemistry of the synthetic smectites, providing a useful tool to constrain their structural formulae and also for assisting in assignments of similar bands in natural smectites. The Al and Fe3+ cations were shown to be randomly distributed in the octahedral sheet of synthesized smectites. Despite the high availability of iron during synthesis, generally only a small amount of tetrahedral Fe3+ was observed.
History
Journal
Applied clay scienceVolume
104Pagination
96 - 105Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0169-1317Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2014, Elsevier B.V.Usage metrics
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No categories selectedKeywords
Science & TechnologyPhysical SciencesTechnologyChemistry, PhysicalMaterials Science, MultidisciplinaryMineralogyChemistryMaterials ScienceNontroniteInfrared spectroscopyNear infraredFe-beidelliteSynthesis(b) parameterOCTAHEDRAL SHEETSAPONITE SERIESFEIRONBEIDELLITESMONTMORILLONITENONTRONITESSPECTRAVACANTCHARGE
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