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Ferrihydrite

Big Photo

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© Peter Andresen

Show Ferrihydrite Photos (4)
Formula:
Fe
 
5
O
 
3
(OH)
 
9
System:TrigonalColour:dark brown, yellow-brown
This page provides mineralogical data about Ferrihydrite.

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, Qostaney Oblysy (Kostanai [Kustany] Oblast'), Kazakhstan
Ridder Mine (Leninogorsk Mine), Rudnyi Altai, Qostaney Oblysy (Kostanai [Kustany] 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
German names:
Ferrihydrit
Spanish names:
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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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Ferrihydrite in the Natural History Museum (London) online catalogue
  • Ferrihydrite details from Handbook of Mineralogy (PDF)
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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.
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    (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.
    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
        • 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')
      • Rudnyi Altai
    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
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Ekaterinburg (Sverdlovsk)
            • Berezovskii (Berezovskii Zavod)
    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
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