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About NaujakasiteHide

Gray to silver-white; colourless in transmitted light.
2 - 3
Specific Gravity:
2.615 - 2.622
Crystal System:
After the type locality at Naujakasik (Naajakasik), Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland. First collected by Gustav Flink in 1897, and first described by Bøgghild (1933).
The Fe2+ analogue of Manganonaujakasite.

Classification of NaujakasiteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings

73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
1 : Condensed Tetrahedral Sheets with double layers

16 : Silicates Containing Aluminum and other Metals
4 : Aluminosilicates of Na and K

Physical Properties of NaujakasiteHide

Pearly on {001}
Gray to silver-white; colourless in transmitted light.
2 - 3 on Mohs scale
Micaceous (perfect) on {001}; on {401} and {010}, distinct.
2.615 - 2.622 g/cm3 (Measured)    2.661 g/cm3 (Calculated)

Optical Data of NaujakasiteHide

Biaxial (-)
RI values:
nα = 1.537 nβ = 1.550 nγ = 1.556
Measured: 52° to 71°, Calculated: 66°
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of NaujakasiteHide

IMA Formula:
Idealised Formula:
Common Impurities:

Crystallography of NaujakasiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 15.025 Å, b = 7.991 Å, c = 10.486 Å
β = 113.67°
a:b:c = 1.88 : 1 : 1.312
Unit Cell V:
1,153.08 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012434NaujakasiteKhalilov A D, Dzhafarov N K, Mamedov K S (1977) Crystal structure of naujakasite - Na6{Fe[(Si,Al)8Si4O26]} Doklady Akademii Nauk Azerbaidzhanskoi SSR 33 35-4019770293
0012670NaujakasiteBasso R, dal Negro A, Giusta A D, Ungaretti L (1975) The crystal structure of naujakasite, a double sheet silicate Gronlands Geologiske Undersogelse: Bulletin 116 11-241975Tuperssuatsiait Bay, Illimaussaq complex, Narsaq, Greenland0293
CIF Raw Data - click here to close

Type Occurrence of NaujakasiteHide

General Appearance of Type Material:
Aggregates of pseudo-hexagonal plates.
Place of Conservation of Type Material:
University of Copenhagen, Copenhagen, Denmark (1933.31); U.S. National Museum of Natural History, Washington, D.C., USA (97479).
Geological Setting of Type Material:
Alkalic intrusion.
Associated Minerals at Type Locality:

Other Language Names for NaujakasiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Naujakasite associated with VilliaumiteNaF
1 photo of Naujakasite associated with AegirineNaFe3+Si2O6

Related Minerals - Nickel-Strunz GroupingHide

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2OMon.
9.EG.15DmisteinbergiteCa(Al2Si2O8)Trig. 3 2 : P3 1 2
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2OTrig.
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2OMon.
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2OTric.
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig.
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]Tric. 1 : P1
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.4.1NephelineNa3K(Al4Si4O16)Hex. 6 : P63
16.4.2Panunzite(K,Na)AlSiO4Hex. 6 : P63
16.4.6Montesommaite(K,Na)9Al9Si23O64 · 10H2OOrth.

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 NaujakasiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bøggild, O.B. (1933): Igalikite and naujakasite, two new minerals from South Greenland. Meddelelser om Grønland. 92 (9), 1-12 .
American Mineralogist(1935): 20: 138 (abstract).
Peterson, O.V. (1967) The mineralogy of naujakasite. Medd. Grønland, 181(6), 1-18.
American Mineralogist (1968): 53: 1780.
Basso, R., A. Dal Negro, A. Della Guista, and L. Ungaretti (1975) The crystal structure of naujakasite.
Geological Survey of Greenland, Report 116: 11-24.
Petersen, O.V. and S. Andersen (1975) The crystal habit of naujakasite. Geological Survey of Greenland, Report 116: 5-9.
Chemical Abstracts (1976): 84: 129188 (abstract).
Khalilov, A.D., N.K. Dzhafarov, and K.S. Mamedov (1977) Crystal structure of naujakasite - Na6{Fe2+[(Si;Al)8Si4O26]}: Dokl. Acad. Nauk Az. SSR, 33(7), 35{40 (in Russian).
Chemical Abstracts (1978): 88: 113658 (abstract).
Andersen, T. and H. Sørensen (2005) Stability of naujakasite in hyperagpaitic melts, and the petrology of naujakasite lujavrite in the Ilímaussaq alkaline complex, South Greenland. Mineralogical Magazine; April 2005; v. 69; no. 2; p. 125-136.

Internet Links for NaujakasiteHide

Localities for NaujakasiteHide

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.
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33; Andersen, T., & Friis, H. (2015). The transition from agpaitic to hyperagpaitic magmatic crystallization in the Ilímaussaq alkaline complex, South Greenland. Journal of Petrology, 56(7), 1343-1364.
Christopher O'Neill specimen, Photo ID: 889336
Chukanov, N.V. (2014): Infrared spectra of mineral species. Extended library. Springer, Dordrecht 2014, p. 442
Grey, I.E., Macrae, C.M., Mumme, W.G. and Pring, A. (2010): Townendite, Na8ZrSi6O18, a new uranium-bearing lovozerite group mineral from the Ilímaussaq alkaline complex, Southern Greenland. American Mineralogist 95, 646-650.
- Petersen, O., Khomyakov, A., Soerensen, H. (2001): Natrophosphate from the Ilimaussaq alkaline complex South Greenland, South Greenland, Geology of Greenland Survey Bulletin, 190, 139-141
O.T.Ljøstad specimen & photo
Metcalf-Johansen, J. (1977): Willemite from the Ilimaussaq alkaline Intrusion. Mineralogical Magazine. 41, 71-75
Vik Vanrusselt photo & collection, Photo-id 489876
Knut Edvard Larsen collection # 1135
Bøggild, O.B. (1933) Igalikite and naujakasite, two new minerals from South Greenland. Medd. Grønland, 92(9), 1-12.
Danø, M., Sørensen, H. (1959): An examination of the rare minerals from the Nepheline Syenites of south west Greenland. Meddelelser om Grønland. 162, Nr.5, Reitzels Forlag, København
Mineral and/or Locality  
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