Experimental synthesis of chlorite from smectite at 300°C in the presence of metallic Fe

D. Guillaume; A. Neaman; M. Cathelineau; R. Mosser-Ruck; C. Peiffert; M. Abdelmoula; J. Dubessy; F. Villieras; A. Baronnet; N. Michau

doi:10.1180/0009855033830096

Experimental synthesis of chlorite from smectite at 300°C in the presence of metallic Fe

D. Guillaume, A. Neaman, M. Cathelineau, R. Mosser-Ruck, C. Peiffert, M. Abdelmoula, J. Dubessy, F. Villieras, A. Baronnet, N. Michau

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

The alteration and transformation behaviour of montmorillonite (bentonite from Wyoming, MX-80) in low-salinity solutions (NaCl, CaC1₂) in the presence of metallic Fe (powder and 8×4×1 mm plate) and magnetite powder was studied in batch experiments at 300°C to simulate the mineralogical and chemical reactions of clays in contact with steel in a nuclear waste repository. The evolutions of pH and solution concentrations were measured over a period of 9 months. The mineralogical and chemical evolution of the clays was studied by XRD, SEM, Transmission Mössbauer Spectroscopy and TEM (EDS, HR imaging and EELS). Dissolution of the di-octahedral smectite of the starting bentonite was observed, in favour of newly formed clays (chlorite and saponite), quartz, feldspars and zeolite. The formation of Fe-chlorite was triggered by contact with the metallic Fe plate and Fe-Mg-chlorite at distance from the Fe plate (>2 mm).

Original language	English
Pages (from-to)	281-302
Number of pages	22
Journal	Clay Minerals
Volume	38
Issue number	3
DOIs	https://doi.org/10.1180/0009855033830096
State	Published - Sep 2003
Externally published	Yes

Keywords

Bentonite
Chlorite
EDS-TEM
EELS-TEM
Exprimental synthesis
Fe
HRTEM imaging
Magnetite
Mössbauer spectroscopy
Saponite
Smectite

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title = "Experimental synthesis of chlorite from smectite at 300°C in the presence of metallic Fe",

abstract = "The alteration and transformation behaviour of montmorillonite (bentonite from Wyoming, MX-80) in low-salinity solutions (NaCl, CaC12) in the presence of metallic Fe (powder and 8×4×1 mm plate) and magnetite powder was studied in batch experiments at 300°C to simulate the mineralogical and chemical reactions of clays in contact with steel in a nuclear waste repository. The evolutions of pH and solution concentrations were measured over a period of 9 months. The mineralogical and chemical evolution of the clays was studied by XRD, SEM, Transmission M{\"o}ssbauer Spectroscopy and TEM (EDS, HR imaging and EELS). Dissolution of the di-octahedral smectite of the starting bentonite was observed, in favour of newly formed clays (chlorite and saponite), quartz, feldspars and zeolite. The formation of Fe-chlorite was triggered by contact with the metallic Fe plate and Fe-Mg-chlorite at distance from the Fe plate (>2 mm).",

keywords = "Bentonite, Chlorite, EDS-TEM, EELS-TEM, Exprimental synthesis, Fe, HRTEM imaging, Magnetite, M{\"o}ssbauer spectroscopy, Saponite, Smectite",

author = "D. Guillaume and A. Neaman and M. Cathelineau and R. Mosser-Ruck and C. Peiffert and M. Abdelmoula and J. Dubessy and F. Villieras and A. Baronnet and N. Michau",

year = "2003",

month = sep,

doi = "10.1180/0009855033830096",

language = "English",

volume = "38",

pages = "281--302",

journal = "Clay Minerals",

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publisher = "Mineralogical Society",

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TY - JOUR

T1 - Experimental synthesis of chlorite from smectite at 300°C in the presence of metallic Fe

AU - Guillaume, D.

AU - Neaman, A.

AU - Cathelineau, M.

AU - Mosser-Ruck, R.

AU - Peiffert, C.

AU - Abdelmoula, M.

AU - Dubessy, J.

AU - Villieras, F.

AU - Baronnet, A.

AU - Michau, N.

PY - 2003/9

Y1 - 2003/9

N2 - The alteration and transformation behaviour of montmorillonite (bentonite from Wyoming, MX-80) in low-salinity solutions (NaCl, CaC12) in the presence of metallic Fe (powder and 8×4×1 mm plate) and magnetite powder was studied in batch experiments at 300°C to simulate the mineralogical and chemical reactions of clays in contact with steel in a nuclear waste repository. The evolutions of pH and solution concentrations were measured over a period of 9 months. The mineralogical and chemical evolution of the clays was studied by XRD, SEM, Transmission Mössbauer Spectroscopy and TEM (EDS, HR imaging and EELS). Dissolution of the di-octahedral smectite of the starting bentonite was observed, in favour of newly formed clays (chlorite and saponite), quartz, feldspars and zeolite. The formation of Fe-chlorite was triggered by contact with the metallic Fe plate and Fe-Mg-chlorite at distance from the Fe plate (>2 mm).

AB - The alteration and transformation behaviour of montmorillonite (bentonite from Wyoming, MX-80) in low-salinity solutions (NaCl, CaC12) in the presence of metallic Fe (powder and 8×4×1 mm plate) and magnetite powder was studied in batch experiments at 300°C to simulate the mineralogical and chemical reactions of clays in contact with steel in a nuclear waste repository. The evolutions of pH and solution concentrations were measured over a period of 9 months. The mineralogical and chemical evolution of the clays was studied by XRD, SEM, Transmission Mössbauer Spectroscopy and TEM (EDS, HR imaging and EELS). Dissolution of the di-octahedral smectite of the starting bentonite was observed, in favour of newly formed clays (chlorite and saponite), quartz, feldspars and zeolite. The formation of Fe-chlorite was triggered by contact with the metallic Fe plate and Fe-Mg-chlorite at distance from the Fe plate (>2 mm).

KW - Bentonite

KW - Chlorite

KW - EDS-TEM

KW - EELS-TEM

KW - Exprimental synthesis

KW - Fe

KW - HRTEM imaging

KW - Magnetite

KW - Mössbauer spectroscopy

KW - Saponite

KW - Smectite

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U2 - 10.1180/0009855033830096

DO - 10.1180/0009855033830096

M3 - Article

AN - SCOPUS:0041673612

SN - 0009-8558

VL - 38

SP - 281

EP - 302

JO - Clay Minerals

JF - Clay Minerals

IS - 3

ER -

Experimental synthesis of chlorite from smectite at 300°C in the presence of metallic Fe

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