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Imogolite

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Formula:
Al2SiO3(OH)4
Name:
For the Japanese name, Imogo, of the brownish yellow volcanic ash soil of Japan in which it occurs.
Described in 1962, rejected by the IMA, but the name Imogolite was approved by the AIPEA Nomenclature Committee at its 1970 Tokyo meeting (Clays and Clay Minerals 19, 131 (1971).

Widespread component of volcanic-ash-derived soils, but occurs also in other environments.
The nano-sized particles have a tube-like morphology.

Related to allophane.


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Classification of ImogoliteHide

Approved
Notes:
Renamed by the IMA
9.ED.20

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
71.1.5.3

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers

Chemical Properties of ImogoliteHide

Formula:
Al2SiO3(OH)4

Type Occurrence of ImogoliteHide

Geological Setting of Type Material:
Decomposition product of volcanic ash in soils in humid environments.

Other Language Names for ImogoliteHide

German:Imogolit
Japanese:芋子石
Spanish:Imogolita

Related Minerals - Nickel-Strunz GroupingHide

9.ED.ClinochrysotileMon. 2/m
9.ED.05DickiteAl2(Si2O5)(OH)4Mon. m : Bb
9.ED.05KaoliniteAl2(Si2O5)(OH)4Tric. 1 : P1
9.ED.05NacriteAl2(Si2O5)(OH)4Mon. m : Bb
9.ED.05Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon. m : Bm
9.ED.10HalloysiteAl2(Si2O5)(OH)4Mon. m : Bb
9.ED.10HisingeriteFe3+2(Si2O5)(OH)4 · 2H2OMon.
9.ED.10Halloysite-7ÅAl2(Si2O5)(OH)4Mon. m : Bb
9.ED.15AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 : P1
9.ED.15AntigoriteMg3(Si2O5)(OH)4Mon. m : Bm
9.ED.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon. m : Bm
9.ED.15Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4Mon.
9.ED.15CaryopiliteMn2+3Si2O5(OH)4Mon.
9.ED.15ChrysotileMg3(Si2O5)(OH)4Mon.
9.ED.15CronstedtiteFe2+2Fe3+((Si,Fe3+)2O5)(OH)4Trig. 3m : P3 1m
9.ED.15Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4Mon.
9.ED.15Greenalite(Fe2+,Fe3+)2-3Si2O5(OH)4Mon.
9.ED.15KellyiteMn2+2Al(AlSiO5)(OH)4Hex.
9.ED.15LizarditeMg3(Si2O5)(OH)4
9.ED.15ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth.
9.ED.15Népouite(Ni,Mg)3(Si2O5)(OH)4Orth.
9.ED.15PecoraiteNi3(Si2O5)(OH)4Mon.
9.ED.15GuidottiiteMn2Fe3+(Fe3+SiO5)(OH)4Hex. 6 : P63
9.ED.20Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2OAmor.
9.ED.20ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2OOrth.
9.ED.20Neotocite(Mn,Fe,Mg)SiO3 · H2OAmor.
9.ED.25BismutoferriteFe3+2Bi(SiO4)2(OH)Mon. m : Bm
9.ED.25ChapmaniteFe3+2Sb3+(Si2O5)O3(OH)Mon. m : Bm

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

71.1.5.1Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2OAmor.
71.1.5.1ChrysotileMg3(Si2O5)(OH)4Mon.
71.1.5.2HisingeriteFe3+2(Si2O5)(OH)4 · 2H2OMon.
71.1.5.4Neotocite(Mn,Fe,Mg)SiO3 · H2OAmor.

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 ImogoliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1987): 51: 327. [Redefinition]
Clays and Clay Minerals (1994): 42: 276.

Internet Links for ImogoliteHide

Localities for ImogoliteHide

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.
China
 
  • Fujian Province
    • Xiamen Prefecture
      • Tong'an District
Acta Petrologica et Mineralogica 11(2), 146-156 (1992)
Japan
 
  • Honshu Island
    • Kanto Region
      • Tochigi Prefecture
        • Kanuma City
Alfredo Petrov collection
  • Kyushu Region
    • Kumamoto prefecture
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Russell, J. D., McHardy, W. J., & Fraser, A. R. (1969). Imogolite: a unique aluminosilicate. Clay Miner, 8, 87-99.
USA
 
  • Hawaii
    • Maui Co.
Wada, K. et al (1972) Clays and Clay Minerals; v. 20; no. 6; p. 375-380.
Jan H.Bernard and Jaroslav Hyrsl,2004,Minerals and their Localities,pg # 299
Mineral and/or Locality  
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