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Kaolinite Subgroup

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About Kaolinite SubgroupHide

Formula:
Al2Si2O5(OH)4
Dioctahedral, Al-rich members of the Kaolinite-Serpentine Group.

Within this group kaolinite, dickite and nacrite are actually polytypes of a single species, but the names have been "grandfathered" by the IMA. The species should probably be kaolinite, with -1A (kaolinite), -1M (nacrite), and -2M (dickite) polytypes. Most of the species in this group have multiple polytypes due to stacking sequence variations.


Chemical Properties of Kaolinite SubgroupHide

Formula:
Al2Si2O5(OH)4

Relationship of Kaolinite Subgroup to other SpeciesHide

Other Members of this group:
Greenalite(Fe2+,Fe3+)2-3Si2O5(OH)4Mon.
ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth.
Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon. m : Bm
Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Group Members:
Dickite Al2(Si2O5)(OH)4Mon. m : Bb
Halloysite Al2(Si2O5)(OH)4Mon. m : Bb
Kaolinite Al2(Si2O5)(OH)4Tric. 1 : P1
Nacrite Al2(Si2O5)(OH)4Mon. m : Bb

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.

Kaolinite Subgroup in petrologyHide

Internet Links for Kaolinite SubgroupHide

Localities for Kaolinite SubgroupHide

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 ListShow

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