Mineralogy Database

Naujakasite Mineral Data

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General Naujakasite Information

Help on Chemical  Formula: Chemical Formula: Na6(Fe++,Mn)Al4Si8O26
Help on Composition: Composition: Molecular Weight = 942.15 gm
   Sodium     14.64 %  Na   19.74 % Na2O
   Manganese   1.46 %  Mn    1.88 % MnO
   Aluminum   11.46 %  Al   21.64 % Al2O3
   Iron        4.45 %  Fe    5.72 % FeO
   Silicon    23.85 %  Si   51.02 % SiO2
   Oxygen     44.15 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na6Fe2+0.75Mn2+0.25Al4Si8O26
Help on Environment: Environment: Associated with arfvedsonite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1933
Help on Locality: Locality: Naujakasik, Tunugdliarfik Fjord, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Naujakasite + Pronunciation Say NAUJAKASITE
Help on Synonym: Synonym: ICSD 4369
  PDF 20-1113

Naujakasite Image

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  Naujakasite   Villiaumite

Comments: Greenish-gray crystals of naujakasite with red villiaumite.
Location: Narsaq river, Kvanefjeld Mt., Ilímaussaq massif, Greenland. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Naujakasite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.8819:1:1.3123
Help on Cell Dimensions: Cell Dimensions: a = 15.039, b = 7.991, c = 10.487, Z = 2; beta = 113.7° V = 1,154.00 Den(Calc)= 2.71
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.99(1), 2.26(0.7), 3.56(0.7),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 1 1 1) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Naujakasite

Help on Cleavage: Cleavage: {001} Perfect, {401} Distinct, {010} Distinct
Help on Color: Color: Gray, Pearl white, Silver white.
Help on Density: Density: 2.622
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Pearly
Help on Streak: Streak: gray white

Optical Properties of Naujakasite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2021,KPDmeas= 0.2089,KC= 0.2029
Ncalc = 1.53 - 1.55
Help on Optical Data: Optical Data: Biaxial (-), a=1.537, b=1.55, g=1.556, bire=0.0190, 2V(Calc)=66, 2V(Meas)=52-71.

Calculated Properties of Naujakasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Naujakasite =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENaujakasite = 3.16 barns/electron
U=PENaujakasite x rElectron Density= 8.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Naujakasite is Not Radioactive

Naujakasite Classification

Help on  Dana Class: Dana Class: (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.01)with double layers
  (73.01.01)Dana Group Naujakasite Na6(Fe,Mn)Al4Si8O26 C 2/m 2/m Manganonaujakasite! Na6(Mn,Fe)Al4Si8O26 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EG.10 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.10 Naujakasite Na6(Fe,Mn)Al4Si8O26 C 2/m 2/m
09.EG.10 Manganonaujakasite! Na6(Mn,Fe)Al4Si8O26 C 2/m 2/m

Other Naujakasite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Naujakasite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.EG.10





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