Narsarsukite Mineral Data

Narsarsukite Mineral Data
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General Narsarsukite Information

Help on Chemical Formula: Chemical Formula: Na2(Ti,Fe+++)Si4(O,F)11
Help on Composition: Composition: Molecular Weight = 387.19 gm
   Sodium    11.88 %  Na   16.01 % Na2O
   Titanium   9.27 %  Ti   15.47 % TiO2
   Iron       3.61 %  Fe    5.16 % Fe2O3
   Silicon   29.02 %  Si   62.07 % SiO2
   Oxygen    41.32 %  O
   Fluorine   4.91 %  F     4.91 % F
               -   %   F    -2.07 % -O=F2    
            ______        ______ 
            100.00 %      101.55 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ti0.75Fe3+0.25Si4O10F
Help on Environment: Environment: Pegmatite dikes.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Narsarsuk, southern Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Narsarsukite + Pronunciation Say NARSARSUKITE
Help on Synonym: Synonym: ICSD 16899
  PDF 11-478
 

Narsarsukite Image

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Narsarsukite

Comments: Narsarsukite crystal in matrix.
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Narsarsukite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.73556
Help on Cell Dimensions: Cell Dimensions: a = 10.74, c = 7.9, Z = 4; V = 911.25 Den(Calc)= 2.82
Help on Crystal System: Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.37(1), 3.26(0.8), 3.394(0.8),
Click Here for Large Narsarsukite Structure Window Crystal Structure:

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Peacor D R , Buerger M J , American Mineralogist , 47 (1962) p.539-556, The determination and refinement of the structure of narsarsukite, Na2TiOSi4O10

 

Physical Properties of Narsarsukite

Help on Cleavage: Cleavage: {???} Good, {???} Good
Help on Color: Color: Brown, Brownish gray, Colorless, Green, Honey yellow.
Help on Density: Density: 2.7
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 7 - Quartz
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Narsarsukite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2197,KPDmeas= 0.2294,KC= 0.2389
Ncalc = 1.64 - 1.67
Help on Optical Data: Optical Data: Uniaxial (+), w=1.609, e=1.63, bire=0.0210.
 

Calculated Properties of Narsarsukite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Narsarsukite =2.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PENarsarsukite = 3.91 barns/electron
U=PENarsarsukite x rElectron Density= 10.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Narsarsukite is Not Radioactive
 

Narsarsukite Classification
Help on Dana Class: Dana Class: 70.01.02.01 (70)Inosilicate Column or Tube Structures
  (70.01)with columnar silicate units
  (70.01.02)Double crankshaft chains
 
70.01.02.01 Narsarsukite Na2(Ti,Fe)Si4(O,F)11 I 4/m 4/m
 
70.01.02.02 Caysichite-(Y) Y2(Ca,Gd)2Si4O10(CO3)3(H2O,O,OH)•3H20 Ccm21 mm2
 
70.01.02.03 Charoite K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)•3(H2O) P*/4 ((pseudo Ortho) 2/m
Help on Strunz Class: Strunz Class: 09.DJ.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DJ -Inosilicates with 4-periodic double and triple chains
 
09.DJ.05 Narsarsukite Na2(Ti,Fe)Si4(O,F)11 I 4/m 4/m
 

Other Narsarsukite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Narsarsukite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST

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Narsarsukite

Na2(Ti,Fe+++)Si4(O,F)11
Dana No: 70.01.02.01 Strunz No: 09.DJ.05
Locality:

 

Notes: