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Natisite Mineral Data

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General Natisite Information

Help on Chemical  Formula: Chemical Formula: Na2(TiO)SiO4
Help on Composition: Composition: Molecular Weight = 201.94 gm
   Sodium    22.77 %  Na   30.69 % Na2O
   Titanium  23.71 %  Ti   39.56 % TiO2
   Silicon   13.91 %  Si   29.75 % SiO2
   Oxygen    39.61 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2TiSiO5
Help on Environment: Environment: In natrolite-ussingite veins cutting alkalic rocks in a differentiated alkalic massif.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Mt. Karnasurt, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the sodium, NAtrium, TItanium, and SIlicon in the composition.
Help on Name Pronunciation: Name Pronunciation: Natisite Say NATISITE
Help on Synonym: Synonym: ICSD 1533
  PDF 29-1279

Natisite Image

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Comments: Yellow-greenish crystals of natisite in matrix.
Location: Mt. Karnasurt, Lovozero, Kola, Russia. Scale: Picture size 1 cm.
© Diederik Visser

Natisite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.78
Help on Cell Dimensions: Cell Dimensions: a = 6.5, c = 5.07, Z = 2; V = 214.21 Den(Calc)= 3.13
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.709(1), 5.05(0.8), 1.689(0.7),

Physical Properties of Natisite

Help on Cleavage: Cleavage: {001} Perfect, {100} Good
Help on Color: Color: Greenish gray, Yellow green.
Help on Density: Density: 3.15
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: white

Optical Properties of Natisite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.173 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.168 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2294,KPDmeas= 0.2279,KC= 0.2757
Ncalc = 1.86 - 1.87
Help on Optical Data: Optical Data: Uniaxial (-), e=1.68, w=1.756, bire=0.0760.

Calculated Properties of Natisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Natisite =3.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PENatisite = 4.79 barns/electron
U=PENatisite x rElectron Density= 14.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Natisite is Not Radioactive

Natisite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.04)Natisite - Yftisite group Natisite Na2(TiO)SiO4 P 4/nmm 4/m 2/m 2/m Paranatisite Na2[TiO(SiO4)] P mc21 mm2 Yftisite-(Y)? (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.AG.40a 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
09.AG.40a Natisite Na2(TiO)SiO4 P 4/nmm 4/m 2/m 2/m

Other Natisite Information

Help on References: References: NAME( AntBidBlaNic2) 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 Natisite :
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.AG.40a





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