Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About NatrosiliteHide

Specific Gravity:
Crystal System:
Derives from the composition, including NATRium (sodium in Latin) and SILIcon.
This page provides mineralogical data about Natrosilite.

Classification of NatrosiliteHide

First Published:

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands

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

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

Physical Properties of NatrosiliteHide

{100} micaceous (perfect), {001} distinct, {01l} poor
2.48 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of NatrosiliteHide

Biaxial (-)
RI values:
nα = 1.507 nβ = 1.517 nγ = 1.521
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:

Chemical Properties of NatrosiliteHide

Common Impurities:

Crystallography of NatrosiliteHide

Crystal System:
Cell Parameters:
a = 12.32 Å, b = 4.84 Å, c = 8.13 Å
β = 104.24°
a:b:c = 2.545 : 1 : 1.68
Unit Cell V:
469.89 ų (Calculated from Unit Cell)
Twins on {100}, were noted on synthetic material by Donnay and Donnay.

X-Ray Powder DiffractionHide

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

Type Occurrence of NatrosiliteHide

General Appearance of Type Material:
pseudohexagonal thick-tabular crystals to 6cm in size
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, 3394.
Mining Institute, St.Petersburg, 1087/1.
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, vis5123, vis5147.
Geological Setting of Type Material:
pegmatitic segregations of nepheline syenite
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.

Synonyms of NatrosiliteHide

Other Language Names for NatrosiliteHide

Simplified Chinese:硅钠石
Traditional Chinese:矽鈉石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Ussingite7 photos of Natrosilite associated with Ussingite on mindat.org.
Villiaumite6 photos of Natrosilite associated with Villiaumite on mindat.org.
Nordite-(Ce)6 photos of Natrosilite associated with Nordite-(Ce) on mindat.org.
Cleiophane3 photos of Natrosilite associated with Cleiophane on mindat.org.
Vuonnemite3 photos of Natrosilite associated with Vuonnemite on mindat.org.
Microcline3 photos of Natrosilite associated with Microcline on mindat.org.
Phosinaite-(Ce)2 photos of Natrosilite associated with Phosinaite-(Ce) on mindat.org.
Manaksite2 photos of Natrosilite associated with Manaksite on mindat.org.
Sphalerite2 photos of Natrosilite associated with Sphalerite on mindat.org.
Aegirine1 photo of Natrosilite associated with Aegirine on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

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.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2OMon. 2/m : B2/m
9.EE.20TuperssuatsiaiteNa2Fe3Si8O20(OH)2 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn5Si8O20(OH)2 · 8-9H2OMon. 2/m : B2/m
9.EE.20WindhoekiteCa2Fe3+2.67[Si8O20](OH)4 · 10H2O Mon. 2/m : B2/m
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
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.
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.
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth.
9.EE.55RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 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.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
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.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2OTric. 1 : P1

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

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
14.1.8SilinaiteNaLiSi2O5 · 2H2OMon. 2/m

Other InformationHide

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.

References for NatrosiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Morey, G.W., Bowen, N.L. (1924) The binary system sodium metasilkicate-silica. Journal of Phsical Chemistry: 20: 1167-1179.
Kracek, F.C. (1930) The system sodium oxide-silica. Journal of Physical Chemistry: 34: 1583-1598.
Donnay, G., Donnay, J.D.H. (1953) Crystal geometry of some alkali silicates. American Mineralogist: 38: 163-171.
Grund, A. (1954) La structure cristalline du disilicate de soude β-Na2Si2O5. Bulletin de la Société Française de Minéralogie et de Cristallographie: 77: 775-785.
Pant, A.K. (1968) A reconsideration of the crystal structure of β-Na2Si2O5. Acta Crystallographica: B24: 1077-1083.
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.
Fleischer, M., Chao, G.Y., Mandarino, J.A. (1976) New mineral names. American Mineralogist: 61: 338-341.
Mortuza, M.G., Dupree, R., Holland, D. (1998) Devitrification of sodium glass: a NMR study. Journal of Materials Science: 33: 3737-3740.
Zubkova, N.V., Pekov, I.V., Pushcharovsky, D.Y. (2014) A review of crystal chemistry of natural silicates of alkaline elements in the light of new structural data. Mineralogical Magazine: 78: 253-265.

Internet Links 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 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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
HORVÁTH, L. & PFENNINGER-HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary).
  • Greenland
    • Kujalleq
      • Narsaq
Andersen, T., & Friis, H. (2015). The transition from agpaitic to hyperagpaitic magmatic crystallization in the Ilímaussaq alkaline complex, South Greenland. Journal of Petrology, 56(7), 1343-1364.
  • Murmansk Oblast
    • Khibiny Massif
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
    • Lovozero Massif
      • Alluaiv Mt
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
World of Stones 95:5-6, p64; Am. Min. 61, 339-340 (1976); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
      • Kedykverpakhk Mt
        • Karnasurt mine (Kedyk area)
Mineralogical Record: 36(4): 397-416.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 19, 2019 17:25:55 Page generated: March 27, 2019 02:32:45
Go to top of page