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NaLiSi2O5 · 2H2O
Colourless, white
Vitreous, Earthy
Crystal System:
The name is derived from its chemical composition: silicon (Si), lithium (Li) and sodium (Na).
This page provides mineralogical data about Silinaite.

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Classification of SilinaiteHide

Approval Year:
First Published:

9 : SILICATES (Germanates)
E : Phyllosilicates
F : Single nets with 6-membered rings, connected by M[4], M[8], etc.

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips

14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals

Physical Properties of SilinaiteHide

Vitreous, Earthy
Transparent, Opaque
Colourless, white
4½ on Mohs scale

Optical Data of SilinaiteHide

Biaxial (+)
RI values:
nα = 1.515 nβ = 1.516 nγ = 1.518
Measured: 64° to 71°, Calculated: 72°
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
relatively weak

Chemical Properties of SilinaiteHide

NaLiSi2O5 · 2H2O
Common Impurities:

Crystallography of SilinaiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.061 Å, b = 8.334 Å, c = 14.383 Å
β = 96.67°
a:b:c = 0.607 : 1 : 1.726
Unit Cell V:
602.55 ų
cell param. A2/n

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005263SilinaiteGrice J D (1991) The crystal structure of silinaite, NaLiSi2O6.2H20: a monophyllosilicate The Canadian Mineralogist 29 363-3671991Mont Saint-Hilaire, Rouville County, Quebec, Canada0293
CIF Raw Data - click here to close

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of SilinaiteHide

Synonyms of SilinaiteHide

Other Language Names for SilinaiteHide


Related Minerals - Nickel-Strunz GroupingHide

9.EF.05PetaliteLiAl(Si4O10)Mon. 2/m : P2/b
9.EF.15SearlesiteNa(H2BSi2O7)Mon. 2 : P21
9.EF.25KanemiteHNaSi2O5 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.EF.30Yakovenchukite-(Y)K3NaCaY2[Si12O30] · 4H2OOrth. mmm (2/m 2/m 2/m) : Pcca

Related Minerals - Dana Grouping (8th Ed.)Hide · 4H2OMon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.1.3RevditeNa16Si16O27(OH)26 · 28H2OMon. 2 : B2
14.1.4MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
14.1.5MagadiiteNa2Si14O29 · 11H2OMon.
14.1.6KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
14.1.7GrumantiteNa(HSi2O5) · H2OOrth. mm2 : Fdd2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SilinaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chao, G.Y., Grice, J.D. and Gault, R.A. (1991), Silinaite, a new sodium lithium silicate hydrate mineral from Mont Saint-Hilaire, Quebec. Canadian Mineralogist: 29: 359-362.
GRICE, J.D. (1991) The crystal structure of silinaite, NaLiSi2O5.2H2O: a monophyllosilicate. Canadian Mineralogist, 29, 363-367.
Klaus Beneke, Peter Thiesen, Gerhard Lagaly (1995): Synthesis and Properties of the Sodium Lithium Silicate Silinaite. Inorg. Chem., 34, 900–907.
Zhou CH, Guo HQ, Cao HJ, Li XN, Ge ZH, Li J (2006): Synthesis and characterization of novel layered lithium sodium silicate (Silinaite) and the mesoporous materials from silinaite. J. Chinese Chem. Lett. 17, 525-528.

Internet Links for SilinaiteHide

Localities for SilinaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Chao, G.Y., Grice, J.D. and Gault, R.A. (1991), Silinaite, a new sodium lithium silicate hydrate mineral from Mont Saint-Hilaire, Quebec. Canadian Mineralogist: 29: 359-362, Grice, et al: 363-367.
Mineral and/or Locality  
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