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Natrosilite

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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.


Classification of NatrosiliteHide

Approved
First Published:
1975
9.EE.40

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

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
14.1.1

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

Physical Properties of NatrosiliteHide

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

Chemical Properties of NatrosiliteHide

Formula:
Na2Si2O5
Common Impurities:
K,H2O

Crystallography of NatrosiliteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 12.32 Å, b = 4.84 Å, c = 8.13 Å
β = 104.24°
Ratio:
a:b:c = 2.545 : 1 : 1.68
Unit Cell V:
469.89 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Twins on {100}, were noted on synthetic material by Donnay and Donnay.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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
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.

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:
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.05BementiteMn7Si6O15(OH)8Mon.
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.
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]Mon.
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.
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6
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.65Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2OTrig.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
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.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2·3H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

74.3.5.2MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
74.3.5.3SilinaiteNaLiSi2O5 · 2H2OMon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.1.2ErtixiiteNa2Si4O9
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

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.

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

ⓘ - 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
 
  • 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).
Denmark
 
  • 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.
Russia
 
  • Murmanskaya 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  
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