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Ferrihydrite

Big Photo

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© O. Dziallas

Show Ferrihydrite Photos (4)
Formula:
Fe
 
5
O
 
3
(OH)
 
9
System:TrigonalColour:dark brown, yellow-brown


A poorly crystalline nanomineral built up of about 20% FeO4 and 80% FeO6 polyhedra.
It forms by rapid oxidation and hydrolysis, and exists in varying degrees of structure disorder; the two extremes are the so-called 2-line and 6-line ferrihydrites (distinguished by their X-ray powder diffraction patterns).
It is a metastable nanomineral precursor to other minerals, e.g. hematite.


Classification of Ferrihydrite

IMA status:Approved 1971
Strunz 8th edition ID:4/F.09-20
Nickel-Strunz 10th (pending) edition ID:4.FE.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
E : Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
Dana 8th edition ID:4.3.2.2

4 : SIMPLE OXIDES
3 : A2X3
Hey's CIM Ref.:7.20.9

7 : Oxides and Hydroxides
20 : Oxides of Fe
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Type Occurrence of Ferrihydrite

Co-type Localities:Belousovskii Mine, Rudnyi Altai, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan
Ridder Mine (Leninogorsk Mine), Rudnyi Altai, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan
Year of Discovery:1971

Physical Properties of Ferrihydrite

Colour:dark brown, yellow-brown
Streak:yellow-brown

Crystallography of Ferrihydrite

Crystal System:Trigonal
Cell Parameters:a = 2.96Å, c = 9.4Å
Ratio:a:c = 1 : 3.176
Unit Cell Volume:V 71.33 ų (Calculated from Unit Cell)

Chemical Properties of Ferrihydrite

Formula:
Fe
 
5
O
 
3
(OH)
 
9
Essential elements:Fe, H, O
All elements listed in formula:Fe, H, O

Relationship of Ferrihydrite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FE.05Amakinite
(Fe
2+
 
,Mg)(OH)
 
2
4.FE.05Brucite
Mg(OH)
 
2
4.FE.05Portlandite
Ca(OH)
 
2
4.FE.05Pyrochroite
Mn(OH)
 
2
4.FE.05Theophrastite
Ni(OH)
 
2
4.FE.10Bayerite
Al(OH)
 
3
4.FE.10Doyleite
Al(OH)
 
3
4.FE.10Gibbsite
Al(OH)
 
3
4.FE.10Nordstrandite
Al(OH)
 
3
4.FE.15Böhmite
AlO(OH)
4.FE.15Lepidocrocite
γ-Fe
3+
 
O(OH)
4.FE.20Grimaldiite
CrO(OH)
4.FE.20Heterogenite
CoO(OH)
4.FE.25Feitknechtite
Mn
3+
 
O(OH)
4.FE.25Lithiophorite
(Al,Li)MnO
 
2
(OH)
 
2
4.FE.30Quenselite
PbMnO
 
2
(OH)
4.FE.40Feroxyhyte
Fe
3+
 
O(OH)
4.FE.40Vernadite
(Mn
4+
 
,Fe
3+
 
,Ca,Na)(O,OH)
 
2
 · nH
 
2
O
4.FE.45Quetzalcoatlite
Zn
 
6
Cu
 
3
(TeO
 
6
)
 
2
(OH)
 
6
·Ag
 
x
Pb
 
y
Cl
 
x+2y
Related Minerals - Hey's Index Grouping:

- +
7.20.1Wüstite
FeO
7.20.2Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
7.20.3Maghemite
Fe
 
2
O
 
3
7.20.4Hematite
Fe
 
2
O
 
3
7.20.5Goethite
α-Fe
3+
 
O(OH)
7.20.6Akaganeite
β-Fe
3+
 
O(OH,Cl)
7.20.7Feroxyhyte
Fe
3+
 
O(OH)
7.20.8Lepidocrocite
γ-Fe
3+
 
O(OH)
7.20.10Amakinite
(Fe
2+
 
,Mg)(OH)
 
2
7.20.11Magnesioferrite
MgFe
3+
2
O
 
4
7.20.12Muskoxite
Mg
 
7
Fe
 
4
O
 
13
·10H
 
2
O
7.20.13Srebrodolskite
Ca
 
2
Fe
 
2
O
 
5
7.20.14Hercynite
FeAl
 
2
O
 
4
7.20.15Brownmillerite
Ca
 
2
(Al,Fe
3+
 
)
 
2
O
 
5

Other Names for Ferrihydrite

Synonyms:
IMA1971-015
Other Languages:
German:Ferrihydrit
Spanish:Ferrihydrita

Other Information

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

References for Ferrihydrite

Reference List:American Mineralogist: 60: 485-486.

American Mineralogist: 75: 437.

American Mineralogist: 79: 767.

Izvestiya Akademii nauk SSSR (1973): (4): 23-33.

Clays and Clay Minerals: 36: 111-124.

Canadian Mineralogist: 28: 185-207.

Internet Links for Ferrihydrite

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    Localities for Ferrihydrite

    Hide Locality List
    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Arctic Ocean
     
    Murdmaa, I.O., Bogdanova, O.Y., Gorshkov, A.I., Novikov, G.V. and Shevchenko, V.P. (2000): Lithology and Mineral Resources 35(6), 594-597.
    Atlantic Ocean
     
    • Mid-Atlantic Ridge complex
    		Bogdanov, Y.A., Vikent’ev, I.V., Lein, A.Y., Bogdanova, O.Y., Sagalevich, A.M., and Sivtsov, A.V. (2008): Geology of Ore Deposits 50(2), 119-134.
    Bogdanov, Y.A., Vikent’ev, I.V., Lein, A.Y., Bogdanova, O.Y., Sagalevich, A.M., and Sivtsov, A.V. (2008): Geology of Ore Deposits 50(2), 119-134.
      • Snake Pit hydrothermal field
    		Bogdanov, Y.A., Vikent’ev, I.V., Lein, A.Y., Bogdanova, O.Y., Sagalevich, A.M., and Sivtsov, A.V. (2008): LGeology of Ore Deposits 50(2), 119-134.
    Bogdanov, Y.A., Vikent’ev, I.V., Lein, A.Y., Bogdanova, O.Y., Sagalevich, A.M., and Sivtsov, A.V. (2008): Geology of Ore Deposits 50(2), 119-134.
    Bogdanov, Y.A., Vikent’ev, I.V., Lein, A.Y., Bogdanova, O.Y., Sagalevich, A.M., and Sivtsov, A.V. (2008): Geology of Ore Deposits 50(2), 119-134.
    Austria
     
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
            • Brixlegg - Rattenberg
              • Geyer - Silberberg District
                • Silberberg Mt.
    		Schnorrer, G. and Poeverlein, R. (2002) Schwaz-Brixlegg-Fundstellen: 2. Die Minerale des Stockerstollens bei Brixlegg in Tirol. Aufschluss, 53, 209-228.
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Iron Quadrangle
          • Nova Lima
    		Spier, C.A., Barros de Oliveira, S.M., Rosière, C.A., and Ardisson, J.D. (2008): Mineralium Deposita 43, 229-254.
        • Poços de Caldas plateau
          • Poços de Caldas
    		Waber (1991)
    China
     
    • Guizhou Province
      • Qianxi'nan Autonomous Prefecture
        • Xingren Co.
    		Zhiwei Bao (2001): PhD Thesis, University of Québec, Canda.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Příbram
    		[Der Aufschluss 1996:6 p.267-287]
    France
     
    • Languedoc-Roussillon
      • Lozère
    		No reference listed
    • Limousin
      • Haute-Vienne
        • Saint-Yrieix-la-Perche
    		Gautier, J, Grosbois, C., Courtin-Nomade, A., Floc'h, J. P. and Martin, F. (2006): Transformation of natural As-associated ferrihydrite downstream of a remediated mining site. Eur. J. Mineral. 18, 187-195.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    • Lower Saxony
      • Harz Mts
        • Goslar
          • Grane Reservoir
    		No reference listed
    • North Rhine-Westphalia
      • Sauerland
        • Arnsberg
          • Hüsten
    		D. Pawlowski: "Mineralfundstellen im Sauerland", Weise (Munich), 1991
    • Saxony
      • Erzgebirge
    		Lapis 30(7/8):78-80 (2005)
    • Schleswig-Holstein
      • Bredstedt
        • Joldelund
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District slag localities
          • Passa Limani area
    		Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals of the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
          • Sounion area
    		Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian, (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
          • Thorikos area
    		Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
          • Vrissaki area
    		Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
    Italy
     
    • Emilia-Romagna
      • Ferrara Province
    		www.lpi.usra.edu/meetings/metsoc2000/pdf/5103.pdf.
    • Liguria
      • Genova Province
        • Sestri Levante
    		Carbone, C. , Marescotti, P., Cabella, R., Lucchetti, G. (2002): Sulfide alteration and related secondary minerals from the Libiola mine (Eastern Liguria, Italy). Poster at the 82° SIMP Congress , Arcavacata di Rende (CS) 18-20/09/2002. Abstract in Plinius 28 , 88-89.
    • Tuscany
      • Livorno Province
        • Piombino
    		Muenchener Micromounter-Lithothek
    Japan
     
    • Nansei Archipelago
      • Kagoshima Prefecture
    		Kazue, T. (2000) Clays and Clay Minerals, 48, 511-520
    Kazakhstan
     
    • Qostaney Oblysy (Kostanai [Kustany] Oblast')
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast')
      • Rudnyi Altai
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pacific Ocean
     
    • East Pacific Rise
      • Juan de Fuca Ridge complex
    		Novikov, G.V., Vikent’ev, I.V., and Bogdanova, O.Y. (2006): Geology of Ore Deposits 48(4), 304-325.
    Novikov, G.V., Vikent’ev, I.V., and Bogdanova, O.Y. (2006): Geology of Ore Deposits 48(4), 304-325.
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Kaczawskie Mts
        • Radzimowice
          • Stara Góra
    		1. R. Siuda, 2001 : New sulphate minerals from the Stara Góra oxidised zone, Radzimowice, Kaczawskie Mts., Mineralogical Society of Poland, Special Papers, vol 18, 186-188
      • Rudawy Janowickie Mts
    		Siuda, R.: Wieściszowice. Otoczak, 2004, nr. 31, p. 58-65.
    Russia
     
    • Central Region
    		Pavel M. Kartashov data
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Ekaterinburg (Sverdlovsk)
            • Berezovskii (Berezovskii Zavod)
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Slovakia
     
    • Bratislava Region
      • Malé Karpaty Mts
    		Majzlan J., Chovan M., Lalinska B., Milovská S., Jurkovič Ľ., 2006: The sstructure and ageing of As-rich ferrihydrite from Pezinok, Slovakia. Acta Miner.-Petrograph.,Abstract Series 5, Szeged, p.70
    USA
     
    • Colorado
      • Clear Creek Co.
        • Geneva District
    		Minerals of Colorado (1997) Eckels, E. B.
    • Kansas
      • Decatur Co.
    		Workshop on Parent-Body and Nebular Modification of Chondritic Materials 4038.pdf http://www.lpi.usra.edu/meetings/chondrite/pdf/4038.pdf
    • Massachusetts
      • Franklin Co.
        • Rowe
    		Cerato, A.. 2003: Mineralogical Study of Davis Mine, Rowe, MA, Using X-Ray Diffraction Techniques
    • Pennsylvania
      • Centre Co.
        • Skytop
          • Bald Eagle Mountain
    		U.S. Geological Survey/ U.s. Department of the Interior
    Mineral and/or Locality
    Google
     
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