STRUCTURAL INVESTIGATIONS OF NATURAL AND SYNTHETIC CHLORITE MINERALS BY X-RAY DIFFRACTION, MöSSBAUER SPECTROSCOPY AND SOLID-STATE NUCLEAR MAGNETIC RESONANCE

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dc.contributor.author Zazzi Å.
dc.contributor.author Hirsch T.K.
dc.contributor.author Leonova E.
dc.contributor.author Kaikkonen A.
dc.contributor.author Edén M.
dc.contributor.author Grins J.
dc.contributor.author Annersten H.
dc.date.accessioned 2024-09-04T09:55:35Z
dc.date.available 2024-09-04T09:55:35Z
dc.date.issued 2006
dc.identifier https://www.elibrary.ru/item.asp?id=31396869
dc.identifier.citation Clays and Clay Minerals, 2006, 54, 2, 252-265
dc.identifier.issn 0009-8604
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/44912
dc.description.abstract The structures of one synthetic and two natural chlorites of the chlinochlore type were explored using X-ray diffraction, magic-angle spinning nuclear magnetic resonance (NMR) and Mössbauer spectroscopy. Rietveld refinements indicated that all structures are of the trioctahedral ordered IIb polytype. Mössbauer spectra provided the ratio IIFe/IIIFe but gave no evidence for the presence of IIIFe in the brucite-like sheet. We also report unit-cell parameters, Mössbauer isomeric shifts, 29Si NMR chemical shifts as well as 27Al isotropic shifts and quadrupolar coupling parameters. Very broad 29Si NMR peaks from the natural samples prevented us from obtaining accurate information on the Si-Al ordering in the tetrahedral sheets; the limitations of 29Si NMR as applied to natural chlorites are discussed. High-resolution 3QMAS NMR resolved the 27Al signal of the M4 octahedral site in the brucite-like sheet from the other three Al signals of crystallographically inequivalent octahedral positions. Copyright © 2006, The Clay Minerals Society.
dc.subject 27AL NMR
dc.subject 29SI NMR
dc.subject CATION DISTRUBUTIONS
dc.subject CHLORITE
dc.subject LAYERED MINERAL
dc.subject MINERAL STRUCTURE
dc.subject MöSSBAUER SPECTROSCOPY
dc.subject XRD
dc.title STRUCTURAL INVESTIGATIONS OF NATURAL AND SYNTHETIC CHLORITE MINERALS BY X-RAY DIFFRACTION, MöSSBAUER SPECTROSCOPY AND SOLID-STATE NUCLEAR MAGNETIC RESONANCE
dc.type Статья
dc.identifier.doi 10.1346/CCMN.2006.0540210


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