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Natrosilite

A valid IMA mineral species
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00261740014948560889945.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
07112620014948560844045.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
09183580017078533233915.jpg
Natrosilite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
08055800014947755805752.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
06658980014947755735863.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
01782750017058706836981.jpg
Natrosilite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
00261740014948560889945.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
08829200014948560847801.jpg
Natrosilite

Palitra pegmatite, Karnasurt mine, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
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About NatrosiliteHide

Formula:
Na2Si2O5
Colour:
Colourless
Lustre:
Pearly
Specific Gravity:
2.48
Crystal System:
Monoclinic
Name:
Derives from the composition, including NATRium (sodium in Latin) and SILIcon.
This page provides mineralogical data about Natrosilite.


Unique IdentifiersHide

Mindat ID:
2863
Long-form identifier:
mindat:1:1:2863:5
GUID
(UUID V4):
5366752c-3ebc-488d-b83d-f2fcd76df4ce

IMA Classification of NatrosiliteHide

Classification of NatrosiliteHide

Strunz-mindat (2024):
9.EE.40

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
Dana 8th ed.:
74.3.5.1

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:
14.1.1

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
NsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of NatrosiliteHide

Lustre:
Pearly
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Cleavage:
Perfect
{100} micaceous (perfect), {001} distinct, {01l} poor.
Density:
2.48 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of NatrosiliteHide

Type:
Biaxial (-)
RI values:
nα = 1.507 nβ = 1.517 nγ = 1.521
2V:
Measured: 49° to 64°, Calculated: 64°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Optical Extinction:
Y ∧ c = -12° to 2°.

Chemistry of NatrosiliteHide

Mindat Formula:
Na2Si2O5
Elements listed:
Na, O, Si - search for minerals with similar chemistry
Common Impurities:
K,H2O

Crystallography of NatrosiliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 12.30(2) Å, b = 4.88(1) Å, c = 8.27(3) Å
β = 104.25°
Ratio:
a:b:c = 2.52 : 1 : 1.695
Unit Cell V:
481.12 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Twins on {100}, were noted on synthetic material by Donnay and Donnay.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009344NatrosilitePant A K (1968) A reconsideration of the crystal structure of beta-Na2Si2O5 Acta Crystallographica B24 1077-108319680293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.06 Å(100)
4.17 Å(60)
3.97 Å(80)
3.64 Å(70)
2.98 Å(90)
2.435 Å(80)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust>4.50
9 : Lava/xenolith minerals (hornfels, sanidinite facies)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of NatrosiliteHide

Type Locality:
ⓘ Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
Pseudohexagonal thick-tabular crystals to 6 cm in size.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia, 3394.
Mining Institute, St.Petersburg, Russia, 1087/1.
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, vis5123, vis5147.
Geological Setting of Type Material:
Pegmatitic segregations of nepheline syenite.
Associated Minerals at Type Locality:
VuonnemiteUssingiteNatroliteMicroclineLomonosovite
Analcime
Reference:
Timoshenkov, I.M., Men´shikov, Y.P., Gannibal, L.F., Bussen, I.V. (1975) A natural sodium silicate, natrosilite, from the Lovozero massif. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 104(3): 317-321.
Download:
http://rruff.info/rruff_1.0/uploads/ZVMO104N3_317.pdf

Synonyms of NatrosiliteHide

Other Language Names for NatrosiliteHide

German:Natrosilit
Simplified Chinese:硅钠石
Spanish:Natrosilita
Traditional Chinese:矽鈉石

Common AssociatesHide

Associated Minerals Based on Photo Data:
7 photos of Natrosilite associated with UssingiteNa2AlSi3O8OH
6 photos of Natrosilite associated with VilliaumiteNaF
6 photos of Natrosilite associated with Nordite-(Ce)(Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
5 photos of Natrosilite associated with SphaleriteZnS
3 photos of Natrosilite associated with VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)
3 photos of Natrosilite associated with MicroclineK(AlSi3O8)
2 photos of Natrosilite associated with Phosinaite-(Ce)Na13Ca2(Ce,La,Th,Nd,Pr)(Si4O12)(PO4)4
2 photos of Natrosilite associated with ManaksiteKNaMnSi4O10
1 photo of Natrosilite associated with AegirineNaFe3+Si2O6
1 photo of Natrosilite associated with KapustiniteNa6ZrSi6O16(OH)2

Related Minerals - Strunz-mindat GroupingHide

9.EE.CairncrossiteSr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-xTric. 1 : P1
9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.07InnsbruckiteMn33(Si2O5)14(OH)38Mon. m : Bm
9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Trig. 3m (3 2/m) : R3m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteFe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20WindhoekiteFe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m : B2/m
9.EE.20Unnamed (Na-Ca-Fe-Silicate-Hydrate)NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric. 1 : P1
9.EE.20Windmountainite◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth. mmm (2/m 2/m 2/m)
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric. 1 : P1
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig. 3 : P3
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.35KodamaiteNa3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2O Tric. 1 : P1
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.EE.55RaiteMn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig. 3m : P3 1c
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig. 3m
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2OTric. 1 : P1
9.EE.80EllingseniteNa5Ca6Si18O38(OH)13 · 6H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2OTric. 1 : P1

Other InformationHide

Notes:
Water soluble. Soluble in weak acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for NatrosiliteHide

References for NatrosiliteHide

Localities for NatrosiliteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH et al. (2000)
Greenland
 
  • Kujalleq
Andersen et al. (2015)
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
Anthony et al. (2000)
Mikhailova et al. (2023)
    • Lovozersky District
      • Alluaiv Mountain
Pekov (1998)
World of Stones 95:5-6 +4 other references
        • Karnasurt mine
Pekov (2005)
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Mineral and/or Locality  
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