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Naujakasite

Big Photo

Narsaq river, Kvanefjeld Mt., Kuannersuit (Kvanefjeld) plateau, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
© Thomas Witzke

Show Naujakasite Photos (7)
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.


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), Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, 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:1933
Geological Setting of type material:Alkalic intrusion.
Associated Minerals at type locality:
Steenstrupine-(Ce)SodaliteArfvedsoniteAnalcime

Physical Properties of Naujakasite

Lustre:Pearly
Diaphaneity (Transparency):Semitransparent
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 (B1 1 2/m) [C2/m] {C1 2/m 1}
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
Idealised Formula:
Na
 
6
(Fe
2+
 
,Mn
2+
 
)Al
 
4
Si
 
8
O
 
26
Essential elements:Al, Fe, H, 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
Ca[Al
 
2
Si
 
2
O
 
8
]
9.EG.20Kampfite
Ba
 
6
[(Si,Al)O
 
2
]
 
8
(CO
 
3
)
 
2
Cl
 
2
(Cl,H
 
2
O)
 
2
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.40Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
·5.5H
 
2
O
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(Fe
2+
 
,Mg,Fe
3+
 
)
 
8
(Si,Al)
 
12
(O,OH)
 
27
9.EG.45Latiumite
K
 
2
Ca
 
6
(Si,Al)
 
11
O
 
25
(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,Ca)
 
3
FeSi
 
3
O
 
10
(Cl,OH)
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
[(OH)
 
10
|(Si
 
9
O
 
22
)
 
4
] · 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
)]
Related Minerals - Hey's Index Grouping:
16.4.1Nepheline
(Na,K)[AlSiO
 
4
]
16.4.2Panunzite
(Na,K)[AlSiO
 
4
]
16.4.3Trikalsilite
(Na,K)[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

German names:
Naujakasit
Spanish names:
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. Medd. 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.

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    Localities for Naujakasite

    (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
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
          • Kuannersuit (Kvanefjeld) plateau
            • Kvanefjeld Mt.
    Bøggild, O.B. (1933) Igalikite and naujakasite, two new minerals from South Greenland. Medd. Grønland, 92(9), 1-12.
    Mineral and/or Locality
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