Pyatenkoite-(Y)
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Pyatenkoite-(Y)
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 Identifiers
Mindat ID:
7259
Long-form identifier:
mindat:1:1:7259:1
IMA Classification of Pyatenkoite-(Y)
Approved
IMA Formula:
Na5YTi4+Si6O18·6H2O
Approval year:
1995
First published:
1996
Classification of Pyatenkoite-(Y)
9.DM.10
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
M : Inosilicates with 6-periodic single chains
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pyt-Y | IMA–CNMNC | Warr, 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)
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
4 - 5 on Mohs scale
Cleavage:
Distinct/Good
moderate {0112}
moderate {0112}
Density:
2.68(5) g/cm3 (Measured) 2.70 g/cm3 (Calculated)
Optical Data of Pyatenkoite-(Y)
Type:
Uniaxial (-)
RI values:
nω = 1.612(2) nε = 1.607(2)
Max. Birefringence:
δ = 0.005
Based on recorded range of RI values above.
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.
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
Pleochroism:
Non-pleochroic
Chemistry of Pyatenkoite-(Y)
Mindat Formula:
Na5YTi[SiO3]6 · 6H2O
Element Weights:
Crystallography of Pyatenkoite-(Y)
Crystal System:
Trigonal
Class (H-M):
32 - Trapezohedral
Space Group:
R32
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 Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012500 | Pyatenkoite-(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 351 283-286 | 1996 | Lovozero massif, Kola Peninsula, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Pyatenkoite-(Y)
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:
Synonyms of Pyatenkoite-(Y)
Other Language Names for Pyatenkoite-(Y)
Relationship of Pyatenkoite-(Y) to other Species
Member of:
Other Members of Hilairite Group:
| Calciohilairite | CaZr[SiO3]3 · 3H2O | Trig. 32 : R32 |
| Hilairite | Na2Zr[SiO3]3 · 3H2O | Trig. 32 : R32 |
| Komkovite | BaZr[Si3O9] · 3H2O | Trig. 32 : R32 |
| Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O | Trig. 32 : R32 |
Common Associates
Associations 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-Ca | (Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
Related Minerals - Strunz-mindat Grouping
| 9.DM. | Kesebolite-(Ce) | CeCa2Mn(AsO4)(SiO3)3 |
| 9.DM.05 | Stokesite | CaSn[Si3O9] · 2H2O |
| 9.DM.10 | Calciohilairite | CaZr[SiO3]3 · 3H2O |
| 9.DM.10 | Hilairite | Na2Zr[SiO3]3 · 3H2O |
| 9.DM.10 | Komkovite | BaZr[Si3O9] · 3H2O |
| 9.DM.10 | Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O |
| 9.DM.15 | Plumbogaidonnayite | PbZrSi3O9 · 2H2O |
| 9.DM.15 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O |
| 9.DM.20 | Chkalovite | Na2BeSi2O6 |
| 9.DM.25 | Vlasovite | Na2ZrSi4O11 |
| 9.DM.30 | Revdite | Na16Si16O27(OH)26 · 28H2O |
| 9.DM.35 | Scheuchzerite | Na(Mn,Mg,Zn)9[VSi9O28(OH)](OH)3 |
| 9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O |
| 9.DM.40 | Hydroterskite | Na2ZrSi6O12(OH)6 |
Other Information
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)
mindat.org URL:
https://www.mindat.org/min-7259.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Pyatenkoite-(Y)
Reference List:
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
Localities for Pyatenkoite-(Y)
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia | |
| Pekov et al. (2004) |
| Pekov (2003) | |
| Khomyakov et al. (1996) +3 other references |
Quick NavTopAbout Pyatenkoite-(Y)Unique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Kukisvumchorr Mt, Murmansk Oblast, Russia