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Fougèrite

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About FougèriteHide

07905570015789536738454.jpg
Fougères, France
Formula:
Fe2+4Fe3+2(OH)12[CO3]·3H2O
Colour:
Bluish green, green, green-black, blackish
Lustre:
Earthy
Crystal System:
Trigonal
Name:
Named for "a forest near Fougères, Brittany, France", where the type material was collected.
The mineral formerly described as fougèrite has been found to be an intimate intergrowth of two phases with distinct Fe2+:Fe3+ ratios. The phase with Fe2+:Fe3+ = 2:1 retains the name fougèrite; that with Fe2+:Fe3+ = 1:2 is defined as the new species trébeurdenite. Both belong to the Fougèrite Group (Mills et al., 2012).

Fougèrite is unstable in air at normal conditions (Trolard et al., 2007); the green (or green-black, blackish), hexagonal, transparent platelets transform quickly into yellow-brown to brown, opaque, often poorly crystalline, brittle iron oxyhydroxides (limonite, goethite, lepidocrocite). Known previously as "Green Rust", mainly from iron-rich slags.

Varieties containing Zn retain their green colour and transparency (Blaß et al., 1997).

The characteristic blue-green colour (5BG6/1 in the Munsell system) of fougèrite has long been used as a universal criterion in soil classification to identify Gleysols (Trolard et al., 2007).


Classification of FougèriteHide

Approved
Approval Year:
2003
First Published:
2007
4.FL.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
6.4.6.2

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous

Physical Properties of FougèriteHide

Earthy
Transparency:
Opaque
Colour:
Bluish green, green, green-black, blackish
Comment:
Only when fresh; alters within hours and days

Chemical Properties of FougèriteHide

Formula:
Fe2+4Fe3+2(OH)12[CO3]·3H2O
IMA Formula:
Fe2+4Fe3+2(OH)12(CO3) · 3H2O

Crystallography of FougèriteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 3.125 Å, c = 22.5 Å
Ratio:
a:c = 1 : 7.2
Unit Cell V:
190.29 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.97Å(100)
3.97Å(32)
2.692Å(34)
2.027Å(19)
1.595Å(9)
1.563Å(10)

Type Occurrence of FougèriteHide

Reference:
Trolard, F., Bourrié, G., Abdelmoula, M., Refait, Ph., Feder, F. (2007) Fougerite, a new mineral of the pyroaurite-iowaite group: description and crystal structure. Clays and Clay Minerals: 55: 323-334.

Synonyms of FougèriteHide

Relationship of Fougèrite to other SpeciesHide

Other Members of this group:
LiudongshengiteZn4Cr2(OH)12(CO3)·3H2OTrig. 3m (3 2/m) : R3m
MössbaueriteFe3+6O4(OH)8[CO3] · 3H2O Trig. 3
TrébeurdeniteFe2+2Fe3+4O2(OH)10CO3·3H2OTrig. 3m (3 2/m) : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Fougèrite associated with LeadPb
2 photos of Fougèrite associated with GypsumCaSO4 · 2H2O
2 photos of Fougèrite associated with CerussitePbCO3
1 photo of Fougèrite associated with CupriteCu2O
1 photo of Fougèrite associated with LeadhillitePb4(CO3)2(SO4)(OH)2

Related Minerals - Nickel-Strunz GroupingHide

4.FL.TrébeurdeniteFe2+2Fe3+4O2(OH)10CO3·3H2OTrig. 3m (3 2/m) : R3m
4.FL.05WoodalliteMg6Cr2(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05IowaiteMg6Fe3+2(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05JamboriteNi2+1-xCo3+x(OH)2-x(SO4)x · nH2OTrig. 3m (3 2/m) : R3m
4.FL.05MeixneriteMg6Al2(OH)16(OH)2 · 4H2OTrig. 3m (3 2/m) : R3m
4.FL.05MuskoxiteMg7Fe4O13 · 10H2OTrig. 3m (3 2/m)
4.FL.10HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2OMon. 2 : P21
4.FL.15KuzeliteCa4Al2(OH)12[SO4] · 6H2OTrig.
4.FL.20AuroriteMn2+Mn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20ChalcophaniteZnMn4+3O7 · 3H2OTrig. 3 : R3
4.FL.20ErnienickeliteNiMn3O7 · 3H2OTrig. 3 : R3
4.FL.20Jianshuiite(Mg,Mn,Ca)Mn3O7 · 3H2OTrig. 3 : R3
4.FL.25WoodruffiteZn2+x/2(Mn4+1-xMn3+x)O2·yH2OMon. 2/m : B2/m
4.FL.30Asbolane(Ni,Co)2-xMn4+(O,OH)4 · nH2OHex.
4.FL.35BuseriteNa4Mn14O27 · 21H2O
4.FL.40Ranciéite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2OTrig. 3 : P3
4.FL.40Takanelite(Mn,Ca)Mn4O9 · H2OHex.
4.FL.45Birnessite(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2OMon. 2/m : B2/m
4.FL.55CianciulliiteMn(Mg,Mn)2Zn2(OH)10 · 2-4H2OMon. 2/m : B2/m
4.FL.60JenseniteCu3[TeO6] · 2H2OMon. 2/m : P21/m
4.FL.65LeisingiteCu2MgTe6+O6 · 6H2OTrig. 3 : P3
4.FL.70AkdalaiteAl10O14(OH)2Hex.
4.FL.75CafetiteCaTi2O5 · H2OMon. 2/m : P21/b
4.FL.80MouriteUMo5O12(OH)10Mon.
4.FL.85DeloryiteCu4(UO2)(MoO4)2(OH)6Mon.

Related Minerals - Dana Grouping (8th Ed.)Hide

6.4.6.1MeixneriteMg6Al2(OH)16(OH)2 · 4H2OTrig. 3m (3 2/m) : R3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FougèriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nieding, E. (1985) Rezente Mineralbildungen in urzeitlichen Kupferschlacken aus Österreich. Aufschluss: 36: 313–318. (in German)
Nieding, E. (1986) Pseudohexagonaler Goethit aus einer Schlacke von Lölling/Kärnten. Carinthia II: 176(96): 57–59. (in German)
Trolard, F., Abdelmoula, M., Bourrie, G., Humbert, B., Genin, J. (1996) Evidence of the occurrence of a 'green rusts' component in hydromorphic soils. Proposed existence of a new mineral fougerite. CRAS (Paris), serie IIa: 232: 1015-1022.
Blaß, G., Graf, H.-W., Pichler, A. (1997) Sekundäre Neubildungen in Schlacken von St. Martin am Silberberg in Kärnten (2). Mineralien-Welt: 8(6): 54-55. (in German)
Refait, P., Abdelmoula, M., Trolard, F., Génin, J.-M.R., Ehrhardt J.J., Bourrié G. (2001) Mössbauer and XAS study of a green rust mineral; the partial substitution of Fe2+ by Mg2+. American Mineralogist: 86(5-6): 731-739.
Génin, J.-M.R., Refait, Ph., Bourrié, G., Abdelmoula, M., Trolard, F. (2001) Structure and stability of the Fe(II)–Fe(III) green rust “fougerite” mineral and its potential for reducing pollutants in soil solutions. Applied Geochemistry: 16(5): 559-570.
Bourrié, G., Trolard, F., Refait, P., Feder, F. (2004) A solid-solution model for Fe(II)-Fe(III)-Mg(II) green rusts and fougerite and estimation of their Gibbs free energies of formation. Clays and Clay Minerals: 52(3): 382-394.
Génin, J.-M.R., Ruby, C. (2004) Anion and cation distributions in Fe(II–III) hydroxysalt green rusts from XRD and Mössbauer analysis (carbonate, chloride, sulphate, …); the “fougerite” mineral. Solid State Sciences: 6: 705-718.
Feder, F., Trolard, F., Klingelhoefer, G., Bourrié, G. (2005) Variations with time and depth of the Fe3+ / Fetot. molar ratio in fougerite in a Gleysol. Evidence from in situ Mössbauer spectroscopy and soil solution composition. Geochimica et Cosmochimica Acta: 69: 4463–4483.
Génin, J.-M. R., Aïssa, R., Géhin, A., Abdelmoula, M., Benali, O., Ernstsen, V., Ona-Nguema, G., Upadhyay, Ch., Ruby, Ch. (2005) Fougerite and FeII-III hydroxycarbonate green rust; ordering, deprotonation and/or cation substitution; structure of hydrotalcite-like compounds and mythic ferrosic hydroxide Fe(OH)2+x. Solid State Sciences: 7: 545-572.
Trolard, F., Bourrié, G. (2006) Structure of fougerite and green rusts and a thermodynamic model for their stabilities. Journal of Geochemical Exploration: 88(1-3): 248-251.
Trolard, F., Bourrié, G., Abdelmoula, M., Refait, Ph., Feder, F. (2007) Fougerite, a new mineral of the pyroaurite-iowaite group: description and crystal structure. Clays and Clay Minerals: 55: 323-334.
Génin, J.-M.R., Ruby, C. (2008) Composition and anion ordering in some FeII-III hydroxysalt green rusts (carbonate, oxalate, methanoate): The fougerite mineral. Solid State Sciences: 10: 244-259.
Christiansen, B.C., Balić-Žunić, T., Petit, P.-O., Frandsen, C., Mørup, S., Geckeis, H., Katerinopoulou, A., Svane Stipp, S.L. (2009) Composition and structure of an iron-bearing, layered double hydroxide (LDH) - Green rust sodium sulphate. Geochimica et Cosmochimica Acta: 73(12): 3579-3592.
Christiansen, B.C., Dideriksen, K., Skovbjerg, L.L., Nedel, S., Stipp, S.L.S. (2011) On fougèrite. Clays and Clay Minerals: 59: 3-9.
Trolard, F., Bourrié, G. (2011) Reply to the letter to the editor by Christiansen, Dideriksen, Skovbjerg, Nedel, and Stipp: "On fougèrite". Clays and Clay Minerals: 59: 10-12.
Mills, S.J., Christy, A.G., Genin, J.-M.R., Kameda, T., Colombo, F. (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine: 76: 1289-1336.

Internet Links for FougèriteHide

Localities for FougèriteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Austria
 
  • Carinthia
    • Sankt Veit an der Glan District
      • Hüttenberg
        • Sankt Martin am Silberberg
Blaß, G., Graf, H.-W. & Pichler, A. (1997): Sekundäre Neubildungen in Schlacken von St. Martin am Silberberg in Kärnten (2). Mineralien-Welt, 8(6), 54-55.
  • Salzburg
    • Zell am See District
      • Rauris
Schebesta, K. (Autoren) Seltene Mineralien aus den alten Goldschlacken im Rauriser Tal, Österreich Jahrgang 1984, Heft März, Seite:
  • Styria
    • Liezen District
      • Admont
        • Johnsbach
          • Severinggraben
peter neschen collection; peter neschen collection
  • Upper Austria
    • Steyr
      • Slag localities
peter neschen collection
Belgium
 
  • Wallonia
    • Liège
      • Plombières-Vieille Montagne-Moresnet mining district (Plombières-Altenberg-Moresnet mining district)
        • Plombières (Blieberg; Bleiberg; Bleyberg)
Blaß, G. & Graf, H. W. (1995b): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
Canada
 
  • Newfoundland and Labrador
    • Newfoundland
      • Baie Verte Peninsula
        • Tilt Cove
Norman Wilson collection
Denmark
 
  • Capital Region
Genin et al. (2005) Solid State Sciences, 7, 545-572.
France
 
  • Auvergne-Rhône-Alpes
    • Loire
      • La Pacaudière
        • Le Crozet
Chollet, P. & Devouard, B. (2013): La mine de cuivre et de plomb des Rats, Le Crozet (Loire). Le Règne Minéral, 109, 7-46.
    • Puy-de-Dôme
      • Aydat
Symposium OS09, OS09 : TUam05 : G7, Authigenic Fe(II)-Fe(III) Oxihydroxides in Lacustrine Anoxic sediments (Aydat Lake, France), Evidenced by Sequential Chemical Extractions and Mössbauer Spectrometry, http://www.the-conference.com/JConfAbs/6/OS09.pdf.
    • Rhône
      • Villefranche
        • Chessy-les-Mines
          • Chessy copper mines
Paul Poulain, Chollet Pascal, Yannick Vessely, Lucien Cluzaud collections
  • Brittany
    • Finistère
      • Poullaouen
Chollet Pascal collection
    • Ille-et-Vilaine
      • Fougères
F. Trolard et al.: CRAS (Paris), serie IIa, no. 232:1015-1022 (1996) Trolard, F., Bourrié, G., Abdelmoula, M., Refait, Ph., Feder, F. (2007): Fougerite, a new mineral of the pyroaurite-iowaite group: description and crystal structure. Clays and Clay Minerals, 55, 323-334.
Germany
 
  • North Rhine-Westphalia
    • Arnsberg
      • Märkischer Kreis
        • Iserlohn
          • Letmathe
Bender, D. and Krimmelbein, W. (1994) Aktuelle Übersicht: Mineralien der Zinkhütte Genna/Sauerland. Stand Juni 1994. Mineralien-Welt, 4/94, 10.
    • Cologne
      • Aachen
        • Eschweiler
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
        • Stolberg
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
      • Euskirchen
        • Mechernich
          • Kall
Blaß, G. & Graf, H. W. (1995): Neufunde von Schlackenhalden in der nördlichen Eifel (II). Mineralien-Welt, 6 (3), 28-31.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion slag localities
          • Sounion area
Laurion The minerals in the ancient slags by Piet Gelade etc.Ko Jansen.
Russia
 
Pavel M. Kartashov data
Switzerland
 
  • Neuchâtel
    • Val-de-Travers
Bonifazi Marco
UK
 
  • England
    • County Durham
      • Castleside
Norman Wilson collection
 
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