Greenland: Naujakasite Lujavrite
Click the microscope button to view a thin section for this sample.
Click the microscope button to view a thin section for this sample.

Fact sheet

Greenland: Naujakasite Lujavrite

Sample MTD08 collected by Michael T. Doel

Described as having naujakasite and nepheline

Rotation 1 - steenstrupine Na14Mn22+(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2·2H2O

Rotation 2 - arfvedsonite [Na][Na2][Fe42+Fe3+]Si8O22(OH)2

Rotation 3 - sodalite Na8(Al6Si6O24)Cl2

Rotation 4 - microcline KAlSi3O8

Ilimaussaq is the type locality for arfvedsonite and naujakasite (good cross-section of the latter at X42.24, Y14.71 mm)

Additional images
  • Long wavelength UV - orange sodalite
  • width 7 cm - white crystals sodalite
  • width 7 cm
  • Long wavelength UV - orange sodalite
61.251527, -48.061066
Ilimaussaq intrusion, Kvanefjeld Uranium mine dumps, SW Greenland
About this collection

The Ilimaussaq alkaline complex is the type locality for agpaitic nepheline syenites and represents an enormous concentration of rare elements, notably Li, Be, Nb, Zr, REE, Y, Th and U. Around 220 mineral species have been identified. We can't identify all the minerals present in these samples. Email us at if you can help.

Note we have recently expanded the collection to include other syenite complexes worldwide.

See also Alex Strekeisen's great website for more information on syenite complexes.

Sample details

Collection: Greenland
Alkaline Suite
Rock-forming mineral
Category guide  
Category Guide
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Accessory minerals
Minerals that occur in very low abundance in a rock. They are usually not visible with the naked eye and contribute perhapssver, they often dominate the rare elements such as platinum group metals.
Rock-forming minerals
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Selecting one or more period, for example 'Jurassic'.
A term used to group together related samples that are not already gathered into a single Collection. For instance, there is a ‘SW England granites’ theme that includes such rock types as granite, hydrothermal breccia, skarn and vein samples.
A general term used to label a rock sample. It is a useful way of grouping similar samples throughout a collection. Category names are often, but not exclusively, common rock names (e.g. granite, basalt, dolerite, gabbro, greisen, skarn, gneiss, amphibolite, limestone, sandstone).
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We would like to thank the following for the use of this sample: