Kakortokite
A rock subtype
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About Kakortokite
Name:
Named for the historical name of the locality: Qaqortoq, Kujalleq, Greenland.
A local name for a variety of agpaitic nepheline syenite displaying pronounced cumulate textures and igneous layering with a repetition of layers enriched in alkali feldspar, eudialyte and arfvedsonite.
Unique Identifiers
Mindat ID:
50010
Long-form identifier:
mindat:1:1:50010:8
GUID
(UUID V4):
(UUID V4):
545b1ff3-57ba-4075-9f90-09c9246327a8
Classification of Kakortokite
Foid-syenite is in section 11 of the QAPF diagram.
Mineralogy of Kakortokite
Essential minerals - these are minerals that are required within the classification of this rock:
Amphibole > Arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
Feldspathoid > Nepheline | Na3K(Al4Si4O16) |
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Kakortokite associated with Arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
3 photos of Kakortokite associated with Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
3 photos of Kakortokite associated with Feldspar Group |
Internet Links for Kakortokite
mindat.org URL:
https://www.mindat.org/min-50010.html
Please feel free to link to this page.
Please feel free to link to this page.
Ilímaussaq complex, Kujalleq, Greenland