Pyatenkoite-(Y) Mineral Data (original) (raw)

General Pyatenkoite-(Y) Information

Help on Chemical Formula: Chemical Formula:

Na5(Y,Dy,Gd)TiSi6O18•6(H2O)

Help on Composition: Composition:

Molecular Weight = 821.63 gm

Sodium 13.99 % Na 18.86 % Na2O

Gadolinium 1.91 % Gd 2.21 % Gd2O3

Dysprosium 1.98 % Dy 2.27 % Dy2O3

Yttrium 7.57 % Y 9.62 % Y2O3

Titanium 5.83 % Ti 9.72 % TiO2

Silicon 20.51 % Si 43.88 % SiO2

Hydrogen 1.47 % H 13.16 % H2O

Oxygen 46.73 % O

______ ______

100.00 % 99.71 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na5Y0.7Dy0.1Gd0.1TiSi6O18•6(H2O)

Help on Environment: Environment:

In hyperagpaitic pegmatites. The titanium-dominant analogue of sazykinaite-(Y)

Help on IMA Status: IMA Status:

Approved IMA 1995 (Dana # Added)

Help on Locality: Locality:

Mont Alluaiv in the northwestern part of the Lovozero alkaline massif, Kila Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

For Yu. A. Pyatenko (1928-), prominent Russian crystal chemist.

Help on Name Pronunciation: Name Pronunciation:

Pyatenkoite-(Y) + Pronunciation Say PYATENKOITE-(Y)

Help on Synonym: Synonym:

ICSD 83238

IMA1995-034

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Pyatenkoite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.47045

Help on Cell Dimensions: Cell Dimensions:

a = 10.696, c = 15.728, Z = 3; V = 1,558.29 Den(Calc)= 2.63

Help on Crystal System: Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: R 32

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.21(1), 2.99(0.85), 5.99(0.6),2.661(0.4), 3.093(0.4),

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| | Forms:( 0 1 2) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ------------------------------------------------------------------------------------------------------------------------- |

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| | Rastsvetaeva R K , Khomyakov A P , Doklady Chemistry , 351 (1996) p.283-286, Crystal structure of pyatenkoite-(Y) Na5YTiSi6O18*6H2O, a new mineral of the, hilairite group: crystal structure, Locality: Lovozero massif, Kola Peninsula, Russia | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Pyatenkoite-(Y)

Help on Cleavage: Cleavage:

{0112} Indistinct

Help on Color: Color:

Colorless.

Help on Density: Density:

2.68

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.

Help on Hardness: Hardness:

4-5 - Fluorite-Apatite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Pyatenkoite-(Y)

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2317,KPDmeas= 0.2274,KC= 0.2317
Ncalc = 1.61 - 1.62

Help on Optical Data: Optical Data:

Uniaxial (-), e=1.607, w=1.612, bire=0.0050.

Calculated Properties of Pyatenkoite-(Y)

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Pyatenkoite-(Y) =2.63 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Help on Photoelectric: Photoelectric:

PEPyatenkoite-(Y) = 38.02 barns/electron
U=PEPyatenkoite-(Y) x relectron= 98.65 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 4,095.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Pyatenkoite-(Y) per GRapi unit = 244.18 (PPM)

Pyatenkoite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Pyatenkoite-(Y) - mild

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour
1000 gm / 8.99 cm 87,173 2.36E-06 4,095.36 1.35
100 gm / 4.17 cm 8,717 2.36E-07 409.54 0.13
10 gm / 1.94 cm 872 2.36E-08 40.95 0.01
1 gm / 8.99 mm 87 2.36E-09 4.10 0.00
0.1 gm / 4.17 mm 9 2.36E-10 0.41 0.00
0.01 gm / 1.94 mm 1 2.36E-11 0.04 0.00
0.001 gm / 0.90 mm 0 2.36E-12 0.00 0.00

Weight of pure Pyatenkoite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.63 gm/cc.*
Goverment Estimate of Average Annual Exposure (360 mRem)**
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.19 % Th) From Sum REE Elements ( 3.89 % REE)

Pyatenkoite-(Y) Classification

Help on Dana Class: Dana Class:

59.02.03.04 (59)Cyclosilicate Three-Membered Rings

(59.02)hydrated

(59.02.03)Hilairite group

59.02.03.01 Hilairite Na2ZrSi3O9•3(H2O) R 3m 3 2/m

59.02.03.02 Calciohilairite CaZrSi3O9•3(H2O) R 32 3 2

59.02.03.03 Sazykinaite-(Y) Na5YZrSi6018•6(H2O) R 32 3 2

59.02.03.04 Pyatenkoite-(Y)! Na5(Y,Dy,Gd)TiSi6O18•6(H2O) R 32 3 2

Help on Strunz Class: Strunz Class:

09.DM.10 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DM -Inosilicates with 6-periodic single chains

09.DM.10 Calciohilairite CaZrSi3O9•3(H2O) R 32 3 2

09.DM.10 Hilairite Na2ZrSi3O9•3(H2O) R 3m 3 2/m

09.DM.10 Komkovite BaZrSi3O9•3(H2O) R 32 3 2

09.DM.10 Pyatenkoite-(Y)! Na5(Y,Dy,Gd)TiSi6O18•6(H2O) R 32 3 2

09.DM.10 Sazykinaite-(Y) Na5YZrSi6018•6(H2O) R 32 3 2

Other Pyatenkoite-(Y) Information

Help on References: References:

NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec, Vol. 28, No. 3)

Help on See Also: See Also:

Links to other databases for Pyatenkoite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Pyatenkoite-(Y) Specimen Label here :

Pyatenkoite-(Y)

Na5(Y,Dy,Gd)TiSi6O18•6(H2O)
Dana No: 59.02.03.04 Strunz No: 09.DM.10
Locality:

Notes: