Pyatenkoite-(Y)
A valid IMA mineral species
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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
GUID
(UUID V4):
(UUID V4):
f52a2c71-8107-4bf9-aba7-c9ffacf39900
IMA Classification of Pyatenkoite-(Y)
Approved
IMA Formula:
Na5YTiSi6O18 · 6H2O
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 |
---|---|---|
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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Chemistry of Pyatenkoite-(Y)
Mindat Formula:
Na5YTi[SiO3]6 · 6H2O
Crystallography of Pyatenkoite-(Y)
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 Structure
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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:
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)
Other Language Names for Pyatenkoite-(Y)
German:Pyatenkoit-(Y)
Russian:Пятенкоит-(Y)
Relationship of Pyatenkoite-(Y) to other Species
Member of:
Other Members of this group:
Calciohilairite | CaZr[SiO3]3 · 3H2O | Trig. 3 2 : R3 2 |
Hilairite | Na2Zr[SiO3]3 · 3H2O | Trig. 3 2 : R3 2 |
Komkovite | BaZr[Si3O9] · 3H2O | Trig. 3 2 : R3 2 |
Sazykinaite-(Y) | Na5YZr[SiO3]6 · 6H2O | Trig. 3 2 : R3 2 |
Common Associates
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-Ca | Ca(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
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 | Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
9.DM.15 | Georgechaoite | NaKZr[Si3O9] · 2H2O |
9.DM.15 | Plumbogaidonnayite | PbZrSi3O9 · 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 | Hydroterskite | Na2ZrSi6O12(OH)6 |
9.DM.40 | Terskite | Na4ZrSi6O16 · 2H2O |
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
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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)
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).
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.
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 |
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Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia