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Zvyaginite

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About ZvyaginiteHide

Formula:
NaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1)
Colour:
Colourless, pearly-white, yellowish-brownish, pale pink or lilac- pink
Lustre:
Greasy
Hardness:
2½ - 3
Specific Gravity:
2.88
Crystal System:
Triclinic
Name:
Named in honor of Russian crystallographer, crystal chemist and physicist Boris B. Zvyagin (1921-2002).
This page provides mineralogical data about Zvyaginite.


Classification of ZvyaginiteHide

Approved
Approval Year:
2013
9.00.

9 : SILICATES (Germanates)
0 :
0 :

Physical Properties of ZvyaginiteHide

Greasy
Transparency:
Transparent, Translucent
Comment:
Nacreous on crystal faces and greasy on broken surface
Colour:
Colourless, pearly-white, yellowish-brownish, pale pink or lilac- pink
Hardness:
2½ - 3 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
{001}
Density:
2.88(3) g/cm3 (Measured)    2.94 g/cm3 (Calculated)

Optical Data of ZvyaginiteHide

Type:
Biaxial (-)
RI values:
nα = 1.626(5) nβ = 1.714(3) nγ = 1.740(5)
2V:
Measured: 45° (15), Calculated: 55°
Max Birefringence:
δ = 0.114
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of ZvyaginiteHide

Formula:
NaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1)
IMA Formula:
Na2ZnTiNb2(Si2O7)2O2(OH)2(H2O)4

Crystallography of ZvyaginiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 8.975(3) Å, b = 8.979(3) Å, c = 12.135(4) Å
α = 74.328(9)°, β = 80.651(8)°, γ = 73.959(8)°
Ratio:
a:b:c = 1 : 1 : 1.351
Unit Cell V:
900.8 ų
Z:
2
Morphology:
Rectangular or irregularly shaped lamellae up to 0.1 X 1 x 2 cm flattened on [001]
Comment:
P-1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.72Å(100)
5.83Å(40)
5.28Å(53)
4.289Å(86)
3.896Å(36)
2.916Å(57)
2.862Å(72)
1.782Å(24)

Type Occurrence of ZvyaginiteHide

Place of Conservation of Type Material:
Fersman Mineralogical Museum of Russian Academy of Sciences, Moscow
Geological Setting of Type Material:
Hydrothermally altered peralkaline pegmatite
Associated Minerals at Type Locality:

Synonyms of ZvyaginiteHide

Relationship of Zvyaginite to other SpeciesHide

Other Members of this group:
Barytolamprophyllite(Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)Mon.
BornemaniteNa6BaTi2Nb(Si2O7)2(PO4)O2(OH)F Tric. 1 : P1
Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2OMon.
EmmerichiteBa2Na(Na,Fe2+)2(Fe3+,Mg)Ti2(Si2O7)2O2F2Mon. 2/m : B2/m
EpistoliteNa2(Nb,Ti)2(Si2O7)O2 · nH2OTric.
Fluorbarytolamprophyllite(Ba,Sr)2[(Na,Fe2+)3(Ti,Mg)F2][Ti2(Si2O7)2O2]Mon. 2/m : B2/m
FluorlamprophylliteNa3(SrNa)Ti3(Si2O7)2O2F2Mon. 2/m : B2/m
InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
KazanskyiteBaNa3Ti2Nb(Si2O7)2O2(OH)2(H2O)4Tric. 1 : P1
Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2Mon.
LileyiteBa2(Na,Fe,Ca)3MgTi2(Si2O7)2O2F2Mon. 2/m : B2/m
NabalamprophylliteNa3(Ba,Na)2Ti3(Si2O7)2O2(OH,F)2Mon. 2/m
Nechelyustovite(Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2(Si2O7)2O2(O,H2O,F)2 · 4.5H2OMon. 2/m : B2/m
PhosphoinneliteNa3Ba4Ti3(Si2O7)2(PO4,SO4)2O2FTric.
PolyphiteNa5(Na4Ca2)Ti2(Si2O7)(PO4)3O2F2Tric. 1 : P1
SaamiteBa☐Na3Ti2Nb(Si2O7)2O2(OH)F(H2O)2Tric. 1 : P1
VuonnemiteNa11Ti4+Nb2(Si2O7)2(PO4)2O3(F,OH)Tric.

Related Minerals - Nickel-Strunz GroupingHide

9.00.Clino-ferri-holmquistite◻{Li2}{Mg3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.00.Shkatulkalita
9.00.AlflarseniteNaCa2Be3Si4O13(OH) · 2H2OMon. 2 : P21
9.00.YegoroviteNa4[Si4O8(OH)4] · 7H2OMon. 2/m : P21/b
9.00.FerroericssoniteBaFe2+2 Fe3+(Si2O7)O(OH) Mon. 2/m : B2/m
9.00.Ferrisepiolite(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m)
9.00.BurnettiteCaVAlSiO6Mon. 2/m : B2/b
9.00.MendigiteMn2Mn2MnCa(Si3O9)2Tric. 1 : P1
9.00.20Rinkite-(Ce)(Ca3Ce)Na(NaCa)Ti(Si2O7)2(OF)F2Mon.

Other InformationHide

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 ZvyaginiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Lykova, I.S., Chukanov, N. V . , Yapaskurt , V.O., Belakovskiy, D.I., Zolotarev, A.A. and Zubkova, N.V. (2013) Zvyaginite, IMA 2013-071. CNMNC Newsletter No. 18, December 2013, page 3251; Mineralogical Magazine, 77,3249-3258.
Pekov, I.V., Lykova, I.S., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Zolotarev, A.A., Jr., Zubkova, N.V. (2014): Zvyaginite NaZnNb2Ti[Si2O7]2O(OH,F)3(H2O) 4+x(х<1) a new mineral of epistolite group from Lovozero alkaline massif (Kola Peninsula, Russia). Zapiski RMO, 143, 45-63.
Sokolova, E. & Camara, F. (2017): The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1T to innelite-1A. Mineralogical Magazine: 81: 1457–1484

Internet Links for ZvyaginiteHide

Localities for ZvyaginiteHide

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.
Russia (TL)
 
  • Murmansk Oblast
    • Lovozersky District
Pekov, I.V., Lykova, I.S., Chukanov, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Zolotarev, A.A., Jr., Zubkova, N.V. (2014): Zvyaginite NaZnNb2Ti[Si2O7]2O(OH,F)3(H2O) 4+x(х<1) a new mineral of epistolite group from Lovozero alkaline massif (Kola Peninsula, Russia). Zapiski RMO, 143, 45-63.
 
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