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Akaganeite

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Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© Stephan Wolfsried

Show Akaganeite Photos (4)
Formula:
β-Fe
3+
 
O(OH,Cl)
System:MonoclinicColour:Yellowish brown, rusty ...
Name:Named after its discovery locality
This page provides mineralogical data about Akaganeite.

Classification of Akaganeite

IMA status:Approved 1962
Strunz 8th edition ID:4/F.06-50
Nickel-Strunz 10th (pending) edition ID:4.DK.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
Dana 8th edition ID:6.1.6.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
1 : XO(OH)
Hey's CIM Ref.:7.20.6

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

Type Locality:Akagane mine, Iwate Prefecture, Tohoku Region, Honshu Island, Japan
General Appearance of Type Material:fine-grained to powdery masses, consisting of bundles of tiny spindlelike crystals up to 5 µm in length
Geological Setting of type material:oxidation zone of a pyrrhotite-bearing iron sulphide deposit, apparently formed from pyrrhotite by ferric-sulphate-bearing solutions
Associated Minerals at type locality:
Pyrrhotite

Occurrences of Akaganeite

Geological Setting:in oxidation zones of pyrrhotite-bearing iron sulphide deposits, as an important constituent of some soils, in certain geothermal brines and in sea-floor nodules, also formed as corrosion product of some meteorites

Physical Properties of Akaganeite

Lustre:Earthy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Yellowish brown, rusty brown
Streak:Brownish yellow
Density (calculated):3.52 g/cm3

Crystallography of Akaganeite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 10.561Å, b = 3.031Å, c = 10.483Å
β = 90.63°
Ratio:a:b:c = 3.484 : 1 : 3.459
Unit Cell Volume:V 335.54 ų (Calculated from Unit Cell)
Z:8
X-Ray Powder Diffraction:
d-spacingIntensity
1.6434 (35)
2.2952 (35)
2.5502 (55)
2.6344 (25)
3.333 (100)
5.276 (30)
Comments:Pattern of synthetic β-FeO(OH)

Optical Data of Akaganeite

Type:Biaxial
Dispersion:r > v strong

Chemical Properties of Akaganeite

Formula:
β-Fe
3+
 
O(OH,Cl)
Idealised Formula:
β-Fe
3+
 
O(OH)
Essential elements:Fe, O
All elements listed in formula:Cl, Fe, H, O
Analyical Data:Sample from Akagané Mine, Japan
Other samples from the locality contain significant Cl; Si and Al are probably impurities
SiO2 (3.10)
AlsO3 (1.21)
Fe2O3 (78.23)
FeO (0.82)
Na2O (0.62)
K2O (0.19)
H2O (15.16)

sum 99.33 wt.-%

Relationship of Akaganeite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.DK.05Ankangite
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
4.DK.05Coronadite
Pb(Mn,Mn)
 
8
O
 
16
4.DK.05Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.05Manjiroite
(Na,K)Mn
 
8
O
 
16
·nH
 
2
O
4.DK.05Mannardite
Ba
 
x
Ti
 
8-2x
V
 
2x
O
 
16
·2-xH
 
2
O
4.DK.05Priderite
(K,Ba)(Ti,Fe)
 
8
O
 
16
4.DK.05Redledgeite
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
4.DK.05Henrymeyerite
BaFe
2+
 
Ti
 
7
O
 
16
4.DK.10Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.10Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
4.DK.10Todorokite
(Mn,Mg,Ca,Ba,K,Na)
 
2
Mn
 
3
O
 
12
·3H
 
2
O
4.DK.10Strontiomelane
SrMn
4+
6
Mn
3+
2
O
 
16
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)
7.20.7Feroxyhyte
Fe
3+
 
O(OH)
7.20.8Lepidocrocite
γ-Fe
3+
 
O(OH)
7.20.9Ferrihydrite
Fe
 
5
O
 
3
(OH)
 
9
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 Akaganeite

Synonyms:
IMA1962-004
German names:
Akaganéit
Japanese names:
赤金鉱
Russian names:
Акаганеит
Spanish names:
Akaganéita

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 Akaganeite

Reference List:Mackay, A. L. (1962): β-ferric ohyhydroxide - akaganéite. Mineralogical Magazine 33, 270-280. - American Mineralogist (1963), 48, 711 (abstract).

American Mineralogist (1971), 56, 659.

Murad, E. (1979): Mössbauer and X-ray data on β-FeOOH (akaganéite). Clay Minerals 14, 273-284.

Buchwald, V. F. and Clarke, R. S., Jr. (1989): Corrosion of Fe-Ni alloys by Cl-containing akaganéite (β-FeOOH): the Antarctic meteorite case. American Mineralogist 74, 656-667.

Post, J. E. and Buchwald, V. F. (1991): Crystal structure refinement of akaganéite. American Mineralogist 76, 272-277.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 7.

Internet Links for Akaganeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Akaganéite details from Handbook of Mineralogy (PDF)
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    Localities for Akaganeite

    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.
    Argentina
     
    • Chaco
      • Gran Chaco
    		J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
    Belgium
     
    • Liège Province
      • Visé
    		1./ A.M. Fransolet, J Jedwab and R. Van Tassel, 1974, Inventaire minéralogique de Richelles, Belgique, Annales de la Société Géologique de Belgique, Tome 27, pp. 23-26.
    Brazil
     
    • South Region
      • Santa Catarina
        • São Francisco do Sul
    		[Mandarino, 1997]
    Canada
     
    • Ontario
      • Sudbury District (Sudbury Complex; Sudbury nickel irruptive)
        • Levack
    		No reference listed
    China
     
    • Guangxi Zhuang Autonomous Region
      • Hechi Prefecture
        • Nandan Co.
          • Lihu - Yaochai area
    		B Hendriksen collection
    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
          • Astfeld
    		No reference listed
          • Grane Reservoir
    		No reference listed
    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
    		No reference listed
          • 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
     
    • Tuscany
      • Livorno Province
        • Campiglia Marittima
    		Int. Assoc. of Collectors of Slag Minerals, 10 (2), 4-6.
        • Piombino
    		Lapis, 20 (4), 13-18+50.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Iwate Prefecture
    		[Min.Mag.(1961) 33, 270-280; Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]
    Mexico
     
    • Sonora
      • Mun. de Trincheras
        • La Mur
    		Panczner(1987):87 - 295.
    New Zealand
     
    Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
    Red Sea
     
    J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
    • North-Western Region
      • Ryazanskaya Oblast'
        • Kasimov District
    		Pekov, I.V. et al (2007) European Journal of Mineralogy, 19, 891-898.
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		http://maurice.strahlen.org/kola/khibiny.htm
    Slovakia
     
    • Prešov Region
      • Northern Slanské Mts
    		Duda et. all.,1981:Minerály severnej časti Slanských vrchov. Min.Slovca,Monografia 2,Bratislava, 98 p
    Sweden
     
    • Norrbotten
      • Pajala
        • Kitkiöjärvi
    		D. Holtstam and J. Söderhielm : "The Muonionalusta iron meteorite from Lapland, Sweden : New finds and findings", 5th International Conference "Mineralogy & Museums", Paris, Sept. 5-8th 2004, Bull. de Liaison de la Soc. Franç. de Minéralogie et Cristallographie, 2004, Vol 16, N°2.
    The Moon
     
    • Mare Crisium
    		Mokhov A.V., Kartashov P.M., Bogatikov O.A. (2007) Moon under a microscope, - Moscow, Nauka, p.128 (in Rus.).
    UK
     
    • England
      • Cornwall
        • St Agnes District
          • Perranzabuloe
    		No reference listed
      • Norfolk
        • Wells-next-the-Sea
    		J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
    USA
     
    • Arizona
      • Mohave Co.
        • Cerbat Mts (Cerbat Range)
          • Wallapai District
            • Mineral Park District
              • Ithaca Peak
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 103; Eidel, J.J., et al (1968), Copper-molybdenum mineralization at Mineral Park, Mohave Co., AZ, in J.D. Ridge (ed.), Ore deposits of the United States, 1933-1967, A,I,M.E.: 1258-1281.
      • Santa Cruz Co.
        • Patagonia Mts
          • Patagonia District
            • Duquesne (Washington Camp)
              • Santo Niño Mine area
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 103.
    • Colorado
      • San Juan Co.
        • Eureka District
    		Minerals of Colorado (1997) Eckels, E. B.
    • Massachusetts
      • Franklin Co.
        • Rowe
    		Cerato, A.. 2003: Mineralogical Study of Davis Mine, Rowe, MA, Using X-Ray Diffraction Techniques
    • Minnesota
      • St. Louis Co.
        • Hibbing
    		J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
    • Nevada
      • Elko Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Pershing Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • New Mexico
      • Taos Co.
    		J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
    • Pennsylvania
      • Chester Co.
    		Jan H.Bernard and Jaroslav Hyrsl,2004,Minerals and their Localities,pg 349
    Mineral and/or Locality
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