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Paravinogradovite

A valid IMA mineral species
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About ParavinogradoviteHide

Formula:
Na1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2O
Colour:
Colourless to white
Lustre:
Vitreous, Pearly
Hardness:
5
Specific Gravity:
2.77
Crystal System:
Triclinic
Name:
For its structural relation to vinogradovite. First described by Khomyakov (1990,1995) as a potential new species, designated as M48, a vinogradovite-like mineral. It was first collected by him in 1986 and by Pavel M. Kartashov in 1988 from the central part of the Khibina alkaline massif, Kola, Russia. Described as a new mineral by Khomyakov et al. (2003).
A secondary mineral formed from vinogradovite (Khomyakov et al. 2003).


Unique IdentifiersHide

Mindat ID:
25599
Long-form identifier:
mindat:1:1:25599:8

IMA Classification of ParavinogradoviteHide

Classification of ParavinogradoviteHide

9.DB.25

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals

Mineral SymbolsHide

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

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

Physical Properties of ParavinogradoviteHide

Vitreous, Pearly
Colour:
Colourless to white
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {001} and indistinct {010}
Fracture:
Splintery
Density:
2.77(2) g/cm3 (Measured)    2.76 g/cm3 (Calculated)

Optical Data of ParavinogradoviteHide

Type:
Biaxial (-)
RI values:
nα = 1.707(2) nβ = 1.741(2) nγ = 1.755(2)
2V:
Measured: 64° (1), Calculated: 64°
Max. Birefringence:
δ = 0.048
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Surface Relief:
Moderate
Dispersion:
r > v
Optical Extinction:
b ≈ Z, a ∧ X = 30°
Pleochroism:
Non-pleochroic
Comments:
Negative elongation

Chemistry of ParavinogradoviteHide

Mindat Formula:
Na1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2O
Element Weights:
Element% weight
O49.309 %
Si22.441 %
Ti21.855 %
Al3.080 %
Na2.624 %
H0.690 %

Calculated from ideal end-member formula.

Crystallography of ParavinogradoviteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 5.253 Å, b = 8.741 Å, c = 12.95 Å
α = 70.46°, β = 78.47°, γ = 89.93°
Ratio:
a:b:c = 0.601 : 1 : 1.482
Unit Cell V:
547.68 ų (Calculated from Unit Cell)
Morphology:
Slender to acicular prismatic crystals.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005880ParavinogradoviteKhomyakov A P, Kulikova I E, Sokolova E V, Hawthorne F C, Kartashov P M (2003) Paravinogradovite, (Na,_)2[(Ti,Fe)4{Si2O6}2{Si3AlO10}(OH)4]H2O, a new mineral species from the Khibina Alkaline Massif, Kola Penninsula, Russia: Description and crystal structure The Canadian Mineralogist 41 989-10022003Khibina Alkaline Massif, Kola Penninsula, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ParavinogradoviteHide

General Appearance of Type Material:
Fan-shaped aggregates of slender to acicular prismatic crystals to 10 mm, pseudomorphing vinogradovite.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (2883/1).
Geological Setting of Type Material:
In vugs of an albite rich pegmatite lens.
Associated Minerals at Type Locality:

Synonyms of ParavinogradoviteHide

Other Language Names for ParavinogradoviteHide

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Paravinogradovite associated with MicroclineK(AlSi3O8)

Related Minerals - Strunz-mindat GroupingHide

9.DB.05PotassiccarpholiteK(Mn2+,Li)2Al4Si4O12(OH,F)8Orth. mmm(2/m2/m2/m) : Ccca
9.DB.05CarpholiteMn2+Al2(Si2O6)(OH)4Orth. mmm(2/m2/m2/m) : Ccca
9.DB.05VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4Orth. mmm(2/m2/m2/m) : Ccca
9.DB.05MagnesiocarpholiteMgAl2Si2O6(OH)4Orth. mmm(2/m2/m2/m) : Ccca
9.DB.05FerrocarpholiteFe2+Al2Si2O6(OH)4Orth. mmm(2/m2/m2/m) : Ccca
9.DB.05BalipholiteBaLiMg2Al3(Si2O6)2(OH)4Orth. mmm(2/m2/m2/m) : Ccca
9.DB.10LorenzeniteNa2Ti2(Si2O6)O3Orth. mmm(2/m2/m2/m) : Pbcn
9.DB.15PunkaruaiviteLiTi2(HSi4O12)(OH)2 · H2OMon. 2/m : B2/b
9.DB.15LintisiteLiNa3Ti2(Si2O6)2O2 · 2H2OMon. 2/m : B2/b
9.DB.17EliseeviteLiNa1.5Ti2(H1.5Si4O12)O2 · 2H2OMon. 2/m : B2/b
9.DB.20KukisvumiteNa6ZnTi4(Si8O24)O4 · 4H2OOrth. mmm(2/m2/m2/m) : Pccn
9.DB.20ManganokukisvumiteNa6MnTi4(Si8O24)O4 · 4H2OOrth. mmm(2/m2/m2/m) : Pccn
9.DB.25VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3Mon. 2/m : B2/b
9.DB.30NchwaningiteMn2+2(SiO3)(OH)2 · H2OOrth. mm2 : Pca21
9.DB.40ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm(2/m2/m2/m)
9.DB.40'UM2005-31-SiO:CuH'Cu11(SiO4)(OH)18 · 9H2O (?)
9.DB.45Aerinite(Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12]Trig. 3m : P3c1
9.DB.50CapranicaiteKCaNaAl4B4Si2O18Mon. 2/m : P21/m

Fluorescence of ParavinogradoviteHide

Weak yellow-green fluorescence in short-wave UV light.

Other InformationHide

Notes:
Not reactive in 1:1 HCl and HNO3 at room or higher temperature.
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 ParavinogradoviteHide

References for ParavinogradoviteHide

Localities for ParavinogradoviteHide

Showing 1 localities.

ⓘ - 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.
Russia (TL)
 
  • Murmansk Oblast
    • Kukisvumchorr Mt
Khomyakov et al. (2003) +1 other reference
 
and/or  
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