Mineralogy Database

Silinaite Mineral Data

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General Silinaite Information

Help on Chemical  Formula: Chemical Formula: NaLiSi2O5•2(H2O)
Help on Composition: Composition: Molecular Weight = 202.13 gm
   Sodium    11.37 %  Na   15.33 % Na2O
   Lithium    3.43 %  Li    7.39 % Li2O
   Silicon   27.79 %  Si   59.45 % SiO2
   Hydrogen   1.99 %  H    17.83 % H2O
   Oxygen    55.41 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaLiSi2O5•2(H2O)
Help on Environment: Environment: In sodalite syenite xenoliths in nepheline syenite in an intrusive alkalic gabbro-syenite complex.
Help on IMA Status: IMA Status: Approved IMA 1991
Help on Locality: Locality: Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For SIlicon, LIthium, and sodium, NAtrium, in the composition.
Help on Name Pronunciation: Name Pronunciation: Silinaite + Pronunciation Say SILINAITE
Help on Synonym: Synonym: ICSD 63718
  PDF 44-1410

Silinaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6072:1:1.7258
Help on Cell Dimensions: Cell Dimensions: a = 5.061, b = 8.334, c = 14.383, Z = 4; beta = 96.6° V = 602.63 Den(Calc)= 2.23
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.847(1), 4.14(1), 7.14(1),

Physical Properties of Silinaite

Help on Cleavage: Cleavage: {001} Perfect, {010} Good, {110} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.24
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white

Optical Properties of Silinaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2315,KPDmeas= 0.2305,KC= 0.2361
Ncalc = 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.515, b=1.516, g=1.518, bire=0.0030, 2V(Calc)=72, 2V(Meas)=64-71.

Calculated Properties of Silinaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.25 gm/cc
note: Specific Gravity of Silinaite =2.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PESilinaite = 1.31 barns/electron
U=PESilinaite x rElectron Density= 2.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Silinaite is Not Radioactive

Silinaite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.03)with joined strips
  (74.03.05)Na phyllosilicates Natrosilite Na2Si2O5 P 21/a 2/m Makatite Na2Si4O8(OH)2•4(H2O) P 21/c 2/m Silinaite NaLiSi2O5•2(H2O) A2/n 2/m Searlesite NaBSi2O5(OH)2 P 21 2
Help on  Strunz Class: Strunz Class: 09.EF.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EF -Single nets with 6-membered rings, � other rings
09.EF.20 Silinaite NaLiSi2O5•2(H2O) A2/n 2/m

Other Silinaite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.76,p2023,1991) OPTIC PROP.(Am.Min.,Vol.76,p2023,1991)
Help on See Also: See Also: Links to other databases for Silinaite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 09.EF.20





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