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Pyatenkoite-(Y)

A valid IMA mineral species
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About Pyatenkoite-(Y)Hide

Formula:
Na5YTi[SiO3]6 · 6H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
2.68
Crystal System:
Trigonal
Member of:
Name:
Named in honor of Yuri Andreevich Pyatenko (Юрий Андреевич Пятенко) (b. 1928), a specialist in the field of crystal chemistry of minerals at IMGRE, Moscow, Russia.
The mineral is the Ti analog of sazykinaite-(Y).


Unique IdentifiersHide

Mindat ID:
7259
Long-form identifier:
mindat:1:1:7259:1
GUID
(UUID V4):
f52a2c71-8107-4bf9-aba7-c9ffacf39900

IMA Classification of Pyatenkoite-(Y)Hide

Classification of Pyatenkoite-(Y)Hide

9.DM.10

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

Mineral SymbolsHide

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

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

Physical Properties of Pyatenkoite-(Y)Hide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
white
Hardness:
4 - 5 on Mohs scale
Cleavage:
Distinct/Good
moderate {0112}
Density:
2.68(5) g/cm3 (Measured)    2.70 g/cm3 (Calculated)

Optical Data of Pyatenkoite-(Y)Hide

Type:
Uniaxial (-)
RI values:
nω = 1.612(2) nε = 1.607(2)
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic

Chemistry of Pyatenkoite-(Y)Hide

Mindat Formula:
Na5YTi[SiO3]6 · 6H2O

Crystallography of Pyatenkoite-(Y)Hide

Crystal System:
Trigonal
Class (H-M):
3 2 - Trapezohedral
Space Group:
R3 2
Cell Parameters:
a = 10.696(5) Å, c = 15.728(6) Å
Ratio:
a:c = 1 : 1.47
Unit Cell V:
1,558.29 ų (Calculated from Unit Cell)
Z:
3

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012500Pyatenkoite-(Y)Rastsvetaeva R K, Khomyakov A P (1996) Crystal structure of pyatenkoite-(Y) Na5YTiSi6O18*6H2O, a new mineral of the hilairite group: crystal structure Doklady Chemistry 351 283-2861996Lovozero massif, Kola Peninsula, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.99 Å(60)
3.21 Å(100)
3.093 Å(40)
2.990 Å(85)
2.661 Å(40)
1.998 Å(55)
1.481 Å(44 broad)

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 Pyatenkoite-(Y)Hide

General Appearance of Type Material:
well-formed rhombohedral crystals, typically 0.2–0.5 mm across
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Moscow.
Geological Setting of Type Material:
hyperagpaitic pegmatites
Associated Minerals at Type Locality:
Reference:
Khomyakov, A.P., Nechelyustov, G.N., Rastsetaeva, R.K. (1996) Pyatenkoite-(Y) Na5(Y,Dy,Gd) TiSi6O18·6H2O – a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 125(4): 72-79. (in Russian, English abs.)

Synonyms of Pyatenkoite-(Y)Hide

Other Language Names for Pyatenkoite-(Y)Hide

Relationship of Pyatenkoite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
CalciohilairiteCaZr[SiO3]3 · 3H2OTrig. 3 2 : R3 2
HilairiteNa2Zr[SiO3]3 · 3H2OTrig. 3 2 : R3 2
KomkoviteBaZr[Si3O9] · 3H2OTrig. 3 2 : R3 2
Sazykinaite-(Y)Na5YZr[SiO3]6 · 6H2OTrig. 3 2 : R3 2

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Pyatenkoite-(Y) associated with Kentbrooksite(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2O
3 photos of Pyatenkoite-(Y) associated with Tsepinite-CaCa(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O

Related Minerals - Strunz-mindat GroupingHide

9.DM.Kesebolite-(Ce)CeCa2Mn(AsO4)(SiO3)3Mon. 2/m : P21/b
9.DM.05StokesiteCaSn[Si3O9] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.DM.10CalciohilairiteCaZr[SiO3]3 · 3H2OTrig. 3 2 : R3 2
9.DM.10HilairiteNa2Zr[SiO3]3 · 3H2OTrig. 3 2 : R3 2
9.DM.10KomkoviteBaZr[Si3O9] · 3H2OTrig. 3 2 : R3 2
9.DM.10Sazykinaite-(Y)Na5YZr[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.15PlumbogaidonnayitePbZrSi3O9 · 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
9.DM.40HydroterskiteNa2ZrSi6O12(OH)6Orth. mmm (2/m 2/m 2/m)
9.DM.40TerskiteNa4ZrSi6O16 · 2H2OOrth. mm2 : Pnc2

Other InformationHide

Notes:
readily soluble in 10% HCl or HNO3,
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 Pyatenkoite-(Y)Hide

References for Pyatenkoite-(Y)Hide

Localities for Pyatenkoite-(Y)Hide

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 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
 
  • Murmansk Oblast
    • Khibiny Massif
Pekov et al. (2004)
Pekov (2003)
    • Lovozersky District
Khomyakov et al. (1996) +3 other references
 
Mineral and/or Locality  
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