Silinaite Mineral Data

General Silinaite Information

Chemical Formula:

NaLiSi2O5•2(H2O)

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

Empirical Formula:

NaLiSi₂O₅•2(H₂O)

Environment:

In sodalite syenite xenoliths in nepheline syenite in an intrusive alkalic gabbro-syenite complex.

IMA Status:

Approved IMA 1991

Locality:

Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

For SIlicon, LIthium, and sodium, NAtrium, in the composition.

Name Pronunciation:

Silinaite + Pronunciation

Synonym:

ICSD 63718

IMA1990-028

PDF 44-1410

Silinaite Crystallography

Axial Ratios:

a:b:c =0.6072:1:1.7258

Cell Dimensions:

a = 5.061, b = 8.334, c = 14.383, Z = 4; beta = 96.6° V = 602.63 Den(Calc)= 2.23

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.847(1), 4.14(1), 7.14(1),

Physical Properties of Silinaite

Cleavage:

{001} Perfect, {010} Good, {110} Good

Color:

Colorless, White.

Density:

2.24

Diaphaneity:

Translucent to Opaque

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Silinaite

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

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

Electron Density:

Bulk Density (Electron Density)=2.25 gm/cc
note: Specific Gravity of Silinaite =2.23 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Silinaite= 1.31 barns/electron
U=PE_Silinaite x rElectron Density= 2.96 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Silinaite is Not Radioactive

Silinaite Classification

Dana Class:

74.03.05.03 (74)Phyllosilicate Modulated Layers

(74.03)with joined strips

(74.03.05)Na phyllosilicates

74.03.05.01 Natrosilite Na2Si2O5 P 2₁/a 2/m

74.03.05.02 Makatite Na2Si4O8(OH)2•4(H2O) P 2₁/c 2/m

74.03.05.03 Silinaite NaLiSi2O5•2(H2O) A2/n 2/m

74.03.05.04 Searlesite NaBSi2O5(OH)2 P 2₁ 2

Strunz Class:

09.EF.20 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EF -Single nets with 6-membered rings, ï¿½ other rings

09.EF.20 Silinaite NaLiSi2O5•2(H2O) A2/n 2/m

Other Silinaite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.76,p2023,1991) OPTIC PROP.(Am.Min.,Vol.76,p2023,1991)

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
17 - WWW-MINCRYST

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Silinaite

NaLiSi2O5•2(H2O)
Dana No: 74.03.05.03 Strunz No: 09.EF.20
Locality:

Notes:

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