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Naujakasite

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Formula:
(Na,K)
 
6
(Fe
2+
 
,Mn
2+
 
,Ca)(Al,Fe)
 
4
Si
 
8
O
 
26
System:MonoclinicColour:Gray to silver-white; ...
Hardness:2 - 3
Name: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 Naujakasite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.29-10
Nickel-Strunz 10th (pending) edition ID:9.EG.10

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
Dana 8th edition ID:73.1.1.1

73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
1 : Condensed Tetrahedral Sheets with double layers
Hey's CIM Ref.:16.4.5

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

Type Locality:Naujakasik (Naajakasik), Tunulliarfik Fjord (Tunugdliarfik), Ilímaussaq complex, Narsaq, Kujalleq, Greenland
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).
Year of Discovery:1897
Geological Setting of type material:Alkalic intrusion.
Associated Minerals at type locality:
Steenstrupine-(Ce)SodaliteArfvedsoniteAnalcime

Physical Properties of Naujakasite

Lustre:Pearly
Diaphaneity (Transparency):Translucent
Comment:Pearly on {001}
Colour:Gray to silver-white; colourless in transmitted light.
Hardness (Mohs):2 - 3
Tenacity:Brittle
Cleavage:Perfect
Micaceous (perfect) on {001}; on {401} and {010}, distinct.
Density (measured):2.615 - 2.622 g/cm3
Density (calculated):2.661 g/cm3

Crystallography of Naujakasite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m
Cell Parameters:a = 15.025Å, b = 7.991Å, c = 10.486Å
β = 113.67°
Ratio:a:b:c = 1.88 : 1 : 1.312
Unit Cell Volume:V 1,153.08 ų (Calculated from Unit Cell)
Z:2

Optical Data of Naujakasite

Type:Biaxial (-)
RI values: nα = 1.537 nβ = 1.550 nγ = 1.556
2V:Measured: 52° to 71°, Calculated: 66°
Maximum Birefringence:δ = 0.019

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Naujakasite

Formula:
(Na,K)
 
6
(Fe
2+
 
,Mn
2+
 
,Ca)(Al,Fe)
 
4
Si
 
8
O
 
26
Simplified for copy/paste:(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
Idealised Formula:
Na
 
6
(Fe
2+
 
,Mn
2+
 
)Al
 
4
Si
 
8
O
 
26
Essential elements:Al, Fe, Na, O, Si
All elements listed in formula:Al, Ca, Fe, K, Mn, Na, O, Si
Common Impurities:Ti,Mg,Ca,K,H2O,P

Relationship of Naujakasite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EG.05Cymrite
BaAl
 
2
Si
 
2
(O,OH)
 
8
· H
 
2
O
9.EG.10Manganonaujakasite
Na
 
6
(Mn
2+
 
,Fe
2+
 
)Al
 
4
Si
 
8
O
 
26
9.EG.15Dmisteinbergite
CaAl
 
2
Si
 
2
O
 
8
9.EG.20Kampfite
Ba
 
12
(Si
 
11
Al
 
5
)O
 
31
(CO
 
3
)
 
8
Cl
 
5
9.EG.25Strätlingite
Ca
 
2
Al
 
2
SiO
 
7
· 8H
 
2
O
9.EG.25Vertumnite
Ca
 
4
Al
 
4
Si
 
4
O
 
6
(OH)
 
24
· 3H
 
2
O
9.EG.30Eggletonite
(Na,K,Ca)
 
2
(Mn,Fe)
 
8
(Si,Al)
 
12
O
 
29
(OH)
 
7
· 11H
 
2
O
9.EG.30Ganophyllite
(K,Na,Ca)
 
2
Mn
 
8
(Si,Al)
 
12
(O,OH)
 
32
· 8H
 
2
O
9.EG.30Tamaite
(Ca,K,Ba,Na)
 
3-4
Mn
 
24
(Si,Al)
 
40
(O,OH)
 
112
· 21H
 
2
O
9.EG.35Coombsite
K(Mn,Fe,Mg)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.35Zussmanite
K(Fe,Mg,Mn)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
9.EG.40Franklinphilite
(K,Na)
 
4
(Mn,Zn,Mg,Fe)
 
48
(Si,Al)
 
72
(O,OH)
 
216
· 6H
 
2
O
9.EG.40Lennilenapeite
K
 
6-7
(Mg,Mn,Fe,Zn)
 
48
(Si,Al)
 
72
(O,OH)
 
216
· 16H
 
2
O
9.EG.40Parsettensite
K
 
1.2
Mn
 
8
(Si,Al)
 
12
O
 
26
(OH)
 
10
9.EG.40Stilpnomelane
(K,Ca,Na)(Fe
2+
 
,Mg,Al,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
36
· nH
 
2
O
9.EG.45Latiumite
(Ca,K)
 
4
(Si,Al)
 
5
O
 
11
(SO
 
4
,CO
 
3
)
9.EG.45Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
] · H
 
2
O
9.EG.50Jagoite
Pb
 
18
Fe
3+
4
[Si
 
4
(Si,Fe
3+
 
)
 
6
][Pb
 
4
Si
 
16
(Si,Fe)
 
4
]O
 
82
Cl
 
6
9.EG.55Wickenburgite
CaPb
 
3
Al
 
2
Si
 
10
O
 
24
(OH)
 
6
9.EG.60Hyttsjöite
Pb
 
18
Ba
 
2
Ca
 
5
Mn
2+
2
Fe
3+
2
Si
 
30
O
 
90
Cl · 6H
 
2
O
9.EG.65Armbrusterite
K
 
5
Na
 
7
Mn
 
15
[(Si
 
9
O
 
22
)
 
4
](OH)
 
10
· 4H
 
2
O
9.EG.70Britvinite
[Pb
 
7
(OH)
 
3
F(BO
 
3
)
 
2
(CO
 
3
)][Mg
 
4.5
(OH)
 
3
(Si
 
5
O
 
14
)]
9.EG.75Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
· 5.5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
16.4.1Nepheline
(Na,K)AlSiO
 
4
16.4.2Panunzite
(K,Na)AlSiO
 
4
16.4.3Trikalsilite
(K,Na)AlSiO
 
4
16.4.4Anorthoclase
(Na,K)AlSi
 
3
O
 
8
16.4.6Montesommaite
(K,Na)
 
9
Al
 
9
Si
 
23
O
 
64
· 10H
 
2
O

Other Names for Naujakasite

Other Languages:
German:Naujakasit
Spanish:Naujakasita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Naujakasite

Reference List:

- +
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 Naujakasite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Naujakasite details from Handbook of Mineralogy (PDF)
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  • Localities for Naujakasite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Greenland
     
    • 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
          • Kuannersuit Plateau (Kvanefjeld)
    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
          • Tunulliarfik Fjord (Tunugdliarfik)
    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
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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