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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 IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 1533
  PDF 29-1279
 

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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 DipyramidalH-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
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:

relectron=3.04 gm/cc
note: rNatisite =3.13 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.03734
Boson Index = 0.96266
Help on Photoelectric: Photoelectric:

PENatisite = 4.79 barns/electron
U=PENatisite x relectron= 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: 52.4.4.1 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.4)with cations in [6] and/or > [6] coordination
  (52.4.4)Natisite - Yftisite group
 
52.4.4.1 Natisite Na2(TiO)SiO4 P 4/nmm 4/m 2/m 2/m
 
52.4.4.2 Paranatisite Na2[TiO(SiO4)] P mc21 mm2
 
52.4.4.3 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: VIII/B.13-10 VIII - Silicates
  VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12]
  VIII/B.13 - Natisite series
 
VIII/B.13-05 Paranatisite Na2[TiO(SiO4)] P mc21 mm2
 
VIII/B.13-10 Natisite Na2(TiO)SiO4 P 4/nmm 4/m 2/m 2/m
 

Other Natisite Information

Help on References: References: 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Natisite

Na2(TiO)SiO4
Dana No: 52.4.4.1 Strunz No: VIII/B.13-10
Locality:

 

Notes:

 

 
   
 
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