Fougerite; from field experiment to the homologation of the mineral

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doi: 10.1016/j.crte.2006.08.003
Authors:Trolard, Fabienne
Author Affiliations:Primary:
INRA, Géochimie des Sols et des Eaux, Aix-en-Provence, France
Volume Title:Comptes Rendus - Académie des Sciences. Géoscience
Source:Comptes Rendus - Académie des Sciences. Géoscience, 338(16), p.1158-1166. Publisher: Elsevier, Paris, France. ISSN: 1631-0713
Publication Date:2006
Note:In English with French summary. Based on Publisher-supplied data; illus.
Summary:Fougerite has been approved as a new mineral by the International Mineralogical Association in February 2004. Its characteristic blue-green colour is used as a universal criterion to identify the gley soils. By oxidation, it transforms into lepidocrocite. The discovery of fougerite in 1996 was the result of 10 years of a study of in situ seasonal dynamics of the system soil-solution, which led to the confirmation of the ancient assumption of the existence of a mixed hydroxide of the group of green rusts (GRs) in gleys. Synthetic GRs consist of a brucitic layer of Fe(II)-Fe(III), whose excess positive charge, due to Fe3+, is compensated in the interlayer by different anions, such as sulphate, chloride, oxalate, carbonate, etc. Physical, chemical, and mineralogical characterizations have been performed as a complement, and have confirmed the first results. In fougerite from Fougeres, Mg is present in the layer in addition to Fe; the nature of the interlayer anion, which can vary depending on the environment, remains an open question. Abstract Copyright (2006) Elsevier, B.V. [C.F.]
Sections:Mineral data; Various topics
Subsections:General; Non-silicates
Subjects:Aqueous solutions; Color; Experimental studies; Field studies; Gleys; Hydroxides; New minerals; Occurrence; Oxides; Physicochemical properties; Soil solutions; Soils; Brittany; Europe; France; Ille-et-Vilaine France; Western Europe; Certification; Fougeres France; Fougerite; Validation
Coordinates:N473500 N484500 W0010300 W0022000
Abstract Numbers:08M/2754
Record ID:2011016312
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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