Transformation of ferrihydrite to hematite: An in situ investigation on the kinetics and mechanisms

H. P. Vu; S. Shaw; L. G. Benning

doi:10.1180/minmag.2008.072.1.217

Transformation of ferrihydrite to hematite: An in situ investigation on the kinetics and mechanisms

H. P. Vu, S. Shaw, L. G. Benning

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Abstract

The kinetics and mechanisms of the transformation of 2-line ferrihydrite (FH) to hematite (HM), in the presence of Pb at elevated temperatures and high pH condition, were elucidated using synchrotron-based, in situ energy dispersive X-ray diffraction (EDXRD). The time-resolved diffraction data indicated that HM crystallization occurred via a two-stage process. Based on the EDXRD data, combined with high-resolution electron microscopic images, an aqueous-aided 2D growth mechanism is proposed for both HM crystallization stages. © 2008 The Mineralogical Society.

Original language	English
Pages (from-to)	217-220
Number of pages	3
Journal	Mineralogical Magazine
Volume	72
Issue number	1
DOIs	https://doi.org/10.1180/minmag.2008.072.1.217
Publication status	Published - 2008

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10.1180/minmag.2008.072.1.217

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title = "Transformation of ferrihydrite to hematite: An in situ investigation on the kinetics and mechanisms",

abstract = "The kinetics and mechanisms of the transformation of 2-line ferrihydrite (FH) to hematite (HM), in the presence of Pb at elevated temperatures and high pH condition, were elucidated using synchrotron-based, in situ energy dispersive X-ray diffraction (EDXRD). The time-resolved diffraction data indicated that HM crystallization occurred via a two-stage process. Based on the EDXRD data, combined with high-resolution electron microscopic images, an aqueous-aided 2D growth mechanism is proposed for both HM crystallization stages. {\textcopyright} 2008 The Mineralogical Society.",

author = "Vu, {H. P.} and S. Shaw and Benning, {L. G.}",

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AU - Vu, H. P.

AU - Shaw, S.

AU - Benning, L. G.

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N2 - The kinetics and mechanisms of the transformation of 2-line ferrihydrite (FH) to hematite (HM), in the presence of Pb at elevated temperatures and high pH condition, were elucidated using synchrotron-based, in situ energy dispersive X-ray diffraction (EDXRD). The time-resolved diffraction data indicated that HM crystallization occurred via a two-stage process. Based on the EDXRD data, combined with high-resolution electron microscopic images, an aqueous-aided 2D growth mechanism is proposed for both HM crystallization stages. © 2008 The Mineralogical Society.

AB - The kinetics and mechanisms of the transformation of 2-line ferrihydrite (FH) to hematite (HM), in the presence of Pb at elevated temperatures and high pH condition, were elucidated using synchrotron-based, in situ energy dispersive X-ray diffraction (EDXRD). The time-resolved diffraction data indicated that HM crystallization occurred via a two-stage process. Based on the EDXRD data, combined with high-resolution electron microscopic images, an aqueous-aided 2D growth mechanism is proposed for both HM crystallization stages. © 2008 The Mineralogical Society.

U2 - 10.1180/minmag.2008.072.1.217

DO - 10.1180/minmag.2008.072.1.217

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SN - 1471-8022

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SP - 217

EP - 220

JO - Mineralogical Magazine

JF - Mineralogical Magazine

IS - 1

ER -

Transformation of ferrihydrite to hematite: An in situ investigation on the kinetics and mechanisms

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