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Terskite

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About TerskiteHide

Formula:
Na4ZrSi6O16 · 2H2O
Colour:
White, pale lilac to violet
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.71
Crystal System:
Orthorhombic
Name:
Named after its discovery locality, near the Terski coast of the White sea (southeastern Kola Peninsula). Tersk is an old name for the Kola peninsula.
This page provides mineralogical data about Terskite.


Classification of TerskiteHide

Approved
Approval year:
1982
First published:
1983
9.DM.40

9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
78.7.15.1

78 : Unclassified Silicates
7 :
14.10.8

14 : Silicates not Containing Aluminum
10 : Silicates of Zr or Hf

Physical Properties of TerskiteHide

Vitreous
Colour:
White, pale lilac to violet
Hardness:
Hardness:
VHN40=426 - 519 kg/mm2 - Vickers
Density:
2.71 g/cm3 (Measured)    2.74 g/cm3 (Calculated)

Optical Data of TerskiteHide

Type:
Biaxial (-)
RI values:
nα = 1.576 nβ = 1.582 nγ = 1.584
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very weak

Chemical Properties of TerskiteHide

Formula:
Na4ZrSi6O16 · 2H2O
Common Impurities:
Mn

Crystallography of TerskiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 14.19 Å, b = 14.75 Å, c = 7.51 Å
Ratio:
a:b:c = 0.962 : 1 : 0.509
Unit Cell V:
1,571.86 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012483TerskitePudovkina Z V, Chernitsova N M (1991) Crystal structure of terskite Na4Zr[H4Si6O18] Doklady Akademii Nauk SSSR 316 645-64919910293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.11 Å(40)
6.67 Å(35)
4.88 Å(35)
4.09 Å(60)
3.53 Å(35)
3.506 Å(50)

Type Occurrence of TerskiteHide

General Appearance of Type Material:
Plates, 1-3.5 mm
Place of Conservation of Type Material:
Fersman Museum, Acad. Sci. USSR, Moscow, and the museum of the Geological Institute, Kola Branch, Acad. Sci. USSR, Apatite.
Geological Setting of Type Material:
Veins in pegmatites of syenites
Associated Minerals at Type Locality:
Reference:
Khomyakov, A.P., Semenov, E.I., Voronkov, A.A., Nechelyustov, G.N. (1983) Terskite, Na4ZrSi6O16·2H2O, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 112(2): 226-232.

Synonyms of TerskiteHide

Other Language Names for TerskiteHide

German:Terskit
Simplified Chinese:突硅钠锆石
Spanish:Terskita
Traditional Chinese:突矽鈉鋯石

Common AssociatesHide

Associated Minerals Based on Photo Data:
16 photos of Terskite associated with AegirineNaFe3+Si2O6
12 photos of Terskite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
7 photos of Terskite associated with LitvinskiteNa2(◻,Na,Mn)ZrSi6O12(OH,O)6
6 photos of Terskite associated with MicroclineK(AlSi3O8)
3 photos of Terskite associated with UssingiteNa2AlSi3O8OH
2 photos of Terskite associated with Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
2 photos of Terskite associated with HackmaniteNa8Al6Si6O24(Cl2,S)
2 photos of Terskite associated with GaidonnayiteNa2Zr(Si3O9) · 2H2O
1 photo of Terskite associated with ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O
1 photo of Terskite associated with RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2O

Related Minerals - Nickel-Strunz GroupingHide

9.DM.05StokesiteCaSn[Si3O9] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.DM.10CalciohilairiteCaZr[SiO3]3 · 3H2OTrig.
9.DM.10HilairiteNa2Zr[SiO3]3 · 3H2OTrig.
9.DM.10KomkoviteBaZr[Si3O9] · 3H2OTrig.
9.DM.10Sazykinaite-(Y)Na5YZr[SiO3]6 · 6H2OTrig. 3 2 : R3 2
9.DM.10Pyatenkoite-(Y)Na5YTi[SiO3]6 · 6H2OTrig. 3 2 : R3 2
9.DM.15GaidonnayiteNa2Zr(Si3O9) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pmna
9.DM.15GeorgechaoiteNaKZr[Si3O9] · 2H2OOrth. mm2
9.DM.20ChkaloviteNa2BeSi2O6Orth. mm2 : Fdd2
9.DM.25VlasoviteNa2ZrSi4O11Mon. 2/m : B2/b
9.DM.30RevditeNa16Si16O27(OH)26 · 28H2OMon. 2 : B2
9.DM.35ScheuchzeriteNa(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.10.1ZirconZr(SiO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
14.10.2HafnonHfSiO4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
14.10.3ZektzeriteLiNaZrSi6O15Orth.
14.10.4ParakeldyshiteNa2ZrSi2O7Tric.
14.10.5VlasoviteNa2ZrSi4O11Mon. 2/m : B2/b
14.10.6Keldyshite(Na,H)2ZrSi2O7Tric. 1 : P1
14.10.7GaidonnayiteNa2Zr(Si3O9) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pmna
14.10.9ElpiditeNa2ZrSi6O15 · 3H2OOrth.
14.10.10HilairiteNa2Zr[SiO3]3 · 3H2OTrig.
14.10.11PetarasiteNa5Zr2(Si6O18)(Cl,OH) · 2H2OMon. 2/m : P21/m
14.10.12KhibinskiteK2ZrSi2O7Mon.
14.10.13WadeiteK2Zr(Si3O9)Hex.
14.10.14DalyiteK2ZrSi6O15Tric.
14.10.15KostyleviteK2Zr(Si3O9) · H2OMon.
14.10.16UmbiteK2(Zr,Ti)Si3O9 · H2OOrth.
14.10.17ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth.
14.10.18GeorgechaoiteNaKZr[Si3O9] · 2H2OOrth. mm2
14.10.19GittinsiteCaZrSi2O7Mon.
14.10.20CalciocatapleiiteCaZr(Si3O9) · 2H2OOrth.
14.10.21CalciohilairiteCaZr[SiO3]3 · 3H2OTrig.
14.10.22ArmstrongiteCaZr[Si6O15] · 3H2OMon.
14.10.23Lemoynite(Na,K)2CaZr2Si10O26 · 5H2OMon. 2/m : B2/b
14.10.24CatapleiiteNa2Zr(Si3O9) · 2H2OMon.
14.10.25BaghdaditeCa6Zr2(Si2O7)2O4Mon. 2/m : P21/b
14.10.26LovozeriteNa2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2OMon.
14.10.27Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2Mon. 2/m : P21/b
14.10.28PenkvilksiteNa4Ti2Si8O22 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
14.10.29DarapiositeKNa2Mn2(Li2ZnSi12)O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
14.10.30BaziriteBaZr(Si3O9)Hex.
14.10.31KomkoviteBaZr[Si3O9] · 3H2OTrig.
14.10.32ZirsinaliteNa6(Ca,Mn2+,Fe2+)Zr(Si6O18)Trig.
14.10.33Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

Fluorescence of TerskiteHide

Bright green fluorescence

Other InformationHide

Thermal Behaviour:
Distinct endothermic effects at 130°C and 410°C, and a
weak endothermic effect at 830°C.
Notes:
Insoluble in 10% HCl or HN03 solution.
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 TerskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Khomyakov, A.P., Semenov, E.I., Voronkov, A.A., Nechellyustov, G.N. (1983) Terskite, Na4ZrSi6O16·H2O, a new mineral. International Geology Review: 25: 1162-1167. (English)
Khomyakov, A.P., Semenov, E.I., Voronkov, A.A., Nechelyustov, G.N. (1983) Terskite, Na4ZrSi6O16·2H2O, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 112(2): 226-232. (in Russian)
Dunn, P.J., Grice, J.D., Fleischer, M., Pabst, A. (1984) New mineral names. American Mineralogist: 69: 210-215.
Pudovkina, Z.V., Chernitsova, N.M. (1991) The crystal structure of terskite Na 4Zr[H4Si6O18]. Doklady Akademii Nauk SSSR: 316: 645-649.
Jambor, J.L., Vanko, D.A. (1992) New mineral names. American Mineralogist: 77: 446-452 (452).
Soviet Physics – Doklady: 36: 201-203.
Semenov, E.I. (2001) Notes on ephesite, terskite, Na-komarovite, ceriopyrochlore-(Ce), joaquinite-(Ce) and other minerals from the Ilímaussaq alkaline complex, South Greenland. GEUS Bulletin: 123-125.
Grice, J.D., Rowe, R., Poirier, G. (2015) Hydroterskite: A new mineral species from the Saint-Amable Sill, Quebec, and a comparison with terskite and elpidite. The Canadian Mineralogist: 53: 821-832.

Internet Links for TerskiteHide

Localities for TerskiteHide

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
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
GRICE, J.D. (1989) Mont Saint-Hilaire, Quebec: Canada's Most Diverse Mineral Locality. In: Famous mineral localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 100-108; 166-175.; HORVÁTH, L., GAULT, R.A. (1990) The mineralogy of Mont Saint-Hilaire. Mineralogical Record, 21, 281-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
Greenland
 
  • Kujalleq
Semenov, E. (2001): Notes on Ephesite, Terskite, Na-Komarovite, Ceriopyrochlore-(Ce), Joaquinite-(Ce) and other minerals from the Ilimaussaq alkaline complex, South Greenland, Geology of Greenland Survey Bulletin 190, 123-125; Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
Russia (TL)
 
  • Murmansk Oblast
    • Lovozersky District
[World of Stones 95:5-6, p64]
        • Umbozero mine (Umbozerskii mine; Umba Mine)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
      • Karnasurt Mountain
Khomyakov, A.P., Semenov, E.I., Voronkov, A.A., Nechellyustov, G.N. (1983) Terskite, Na4ZrSi6O16·H2O, a new mineral. International Geology Review: 25: 1162-1167.; RØNSBO, J.G., KHOMYAKOV, A.P., SEMENOV, E.I., VORONKOV, A.A., and GARANIN, V.K (1979) Vitusite, a new phosphate of sodium and rare earths from the Lovozero alkaline massif, Kola and Ilímaussaq alkaline intrusion, South Greenland. Neues Jahrbuch für Mineralogie, Abhandlungen, 137, (1) 42-53. Abstract in: American Mineralogist (1980): 65: 812.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Zubkova, N. V., Pekov, I. V., Pushcharovsky, D. Y., & Chukanov, N. V. (2009). The crystal structure and refined formula of mountainite, KNa2Ca2 [Si8O19 (OH)]⊙ 6 H2O. Zeitschrift für Kristallographie, 224(8), 389-396.
 
Mineral and/or Locality  
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