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Silinaite

Formula:
NaLiSi
 
2
O
 
5
·2H
 
2
O
System:MonoclinicColour:Colourless, white
Hardness:4½
Name:The name is derived from its chemical composition: silicon (Si), lithium (Li) and sodium (Na).
This page provides mineralogical data about Silinaite.

Classification of Silinaite

IMA status:Approved 1990
Strunz 8th edition ID:8/G.05-05
Nickel-Strunz 10th (pending) edition ID:9.EF.20

9 : SILICATES (Germanates)
E : Phyllosilicates
F : Single nets with 6-membered rings, connected by M[4], M[8], etc.
Dana 8th edition ID:74.3.5.3

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:14.1.8

14 : Silicates not Containing Aluminum
1 : Silicates of the alkali metals
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Type Occurrence of Silinaite

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada
Year of Discovery:1991

Physical Properties of Silinaite

Lustre:Vitreous, Earthy
Diaphaneity (Transparency):Transparent, Opaque
Colour:Colourless, white
Hardness (Mohs):4½

Crystallography of Silinaite

Crystal System:Monoclinic
Cell Parameters:a = 5.06Å, b = 8.33Å, c = 14.38Å
β = 96.67°
Ratio:a:b:c = 0.607 : 1 : 1.726
Unit Cell Volume:V 602.01 ų (Calculated from Unit Cell)

Optical Data of Silinaite

Type:Biaxial (+)
RI values: nα = 1.515 nβ = 1.516 nγ = 1.518
2V:Measured: 64° to 71°, Calculated: 72°
Maximum Birefringence:δ = 0.003

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:relatively weak

Chemical Properties of Silinaite

Formula:
NaLiSi
 
2
O
 
5
·2H
 
2
O
Essential elements:H, Li, Na, O, Si
All elements listed in formula:H, Li, Na, O, Si
Common Impurities:Al,Ca

Relationship of Silinaite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.EF.05Petalite
LiAlSi
 
4
O
 
10
9.EF.10Sanbornite
Ba
 
2
[Si
 
4
O
 
10
]
9.EF.15Searlesite
NaBSi
 
2
O
 
5
(OH)
 
2
9.EF.25Kanemite
NaHSi
 
2
O
 
4
(OH)
 
2
·2H
 
2
O
9.EF.30Yakovenchukite-(Y)
K
 
3
NaCaY
 
2
[Si
 
12
O
 
30
] · 4H
 
2
O
Related Minerals - Hey's Index Grouping:
14.1.1Natrosilite
Na
 
2
Si
 
2
O
 
5
14.1.2Ertixiite
Na
 
2
Si
 
4
O
 
9
14.1.3Revdite
Na
 
16
Si
 
16
O
 
27
(OH)
 
26
·28H
 
2
O
14.1.4Makatite
Na
 
2
Si
 
4
O
 
8
(OH)
 
2
·4H
 
2
O
14.1.5Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
14.1.6Kenyaite
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
·6H
 
2
O
14.1.7Grumantite
Na[Si
 
2
O
 
4
(OH)]·H
 
2
O

Other Names for Silinaite

Synonyms:
IMA1990-028Unnamed (MSH UK-81)
German names:
Silinait
Russian names:
Силинаит
Spanish names:
Silinaita

Other Information

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

References for Silinaite

Reference List:Canadian Mineralogist (1991), 29, 359-362.

New Minerals (1997), New Minerals 1990-1994.

Internet Links for Silinaite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Silinaite in the Natural History Museum (London) online catalogue
  • Silinaite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Wright's Rock Shop - excellent mineral specimens since 1970
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  • Top quality minerals from Kristalle of California
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    Localities for Silinaite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Rouville Co.
        • 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.
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