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

General Yakovenchukite-(Y) Information

Help on Chemical Formula: Chemical Formula:

K3NaCaY2(Si12O30)•4H2O

Help on Composition: Composition:

Molecular Weight = 1,256.79 gm

Potassium 8.87 % K 10.68 % K2O

Sodium 3.20 % Na 4.32 % Na2O

Calcium 2.42 % Ca 3.39 % CaO

Cerium 0.11 % Ce 0.13 % Ce2O3

Dysprosium 0.65 % Dy 0.74 % Dy2O3

Yttrium 12.17 % Y 15.45 % Y2O3

Erbium 0.80 % Er 0.91 % Er2O3

Thulium 0.13 % Tm 0.15 % Tm2O3

Thorium 0.55 % Th 0.63 % ThO2

Ytterbium 1.38 % Yb 1.57 % Yb2O3

Silicon 26.82 % Si 57.37 % SiO2

Hydrogen 0.52 % H 4.69 % H2O

Oxygen 42.38 % O

______ ______

100.00 % 100.03 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

K2.85Na0.15NaCa0.71Na0.6Y1.72Yb0.1Er0.06Dy0.05Th0.03Ce0.01Tm0.01Ca0.05Si12O30.02�3.27(H2O)

Help on Environment: Environment:

Low-temperature hydrothermal mineral, formed by alteration of earlier REE-rich minerals. New structure type with Si12O30 sheets with 4- ,6- and 14 member rings.

Help on IMA Status: IMA Status:

Approved IMA 2006 (Dana # Added)

Help on Locality: Locality:

Mt. Kukisvumchorr, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Victor N. Yakovenchuk, a mineralogist at the Geological Institute of the Kola Science Centre of the Russian Academy of Sciences.

Help on Synonym: Synonym:

IMA2006-002

Yakovenchukite-(Y) Image

Click Here for Larger Yakovenchukite-(Y) Image in a New Browser Window Images:

Click Here for Larger Yakovenchukite-(Y) Image Yakovenchukite-(Y) Comments: B&W image of a druse of yakovenchukite-(Y) crystals in a void within sodalite-aegirine-microcline veinlet in ijoliteurtite. (AmMin v92:1527). Location: Mt. Kukisvumchorr (Khibiny Massif), Russia.Scale: Picture size 3.0 x 2.4 mm. © American Mineralogist

Yakovenchukite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.059:1:1.0323

Help on Cell Dimensions: Cell Dimensions:

a = 14.972, b = 14.137, c = 14.594, Z = 4; V = 3,088.95 Den(Calc)= 2.70

Help on Crystal System: Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcca

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.337(1)(331), 3.248(0.9)(024), 3.014(0.8)(422),6.57(0.6)(102), 4.2(0.5)(222), 2.608(0.4)(404), 3.101(0.4)(142), 7(0.4)(020),

Click Here for Large Yakovenchukite-(Y) Structure Window Crystal Structure:

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Help on Above

| | Krivovichev S V , Pakhomovsky Y A , Ivanyuk G Y , Mikhailova J A , Men shikov Y P , Armbruster T , Selivanova E A , Meisser N , American Mineralogist , 92 (2007) p.1525-1530, Yakovenchukite-(Y), K3NaCaY2(Si12O30)(H2O)4, a new mineral from the Khibiny, massif, Kola Peninsula, Russia: a novel type of octahedral-tetrahedral, open-framework structure, Locality: Khibiny massif, Kola Peninsula, Russia | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Yakovenchukite-(Y)

Help on Cleavage: Cleavage:

{100} Perfect, {010} Distinct

Help on Color: Color:

Creamy, Colorless.

Help on Density: Density:

2.83

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Acicular - Occurs as needle-like crystals.

Help on Habit: Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Help on Hardness: Hardness:

5 - Apatite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Yakovenchukite-(Y)

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.08 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1954,KPDmeas= 0.1865,KC= 0.2026
Ncalc = 1.55 - 1.57

Help on Optical Data: Optical Data:

Biaxial (+), a=1.52, b=1.525, g=1.538, bire=0.0180

Calculated Properties of Yakovenchukite-(Y)

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Yakovenchukite-(Y) =2.70 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PEYakovenchukite-(Y) = 54.32 barns/electron
U=PEYakovenchukite-(Y) x relectron= 143.52 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 11,687.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Yakovenchukite-(Y) per GRapi unit = 85.56 (PPM)

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

Estimated Radioactivity from Yakovenchukite-(Y) - weak

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour
1000 gm / 8.91 cm 250,825 6.78E-06 11,687.32 3.84
100 gm / 4.14 cm 25,083 6.78E-07 1,168.73 0.38
10 gm / 1.92 cm 2,508 6.78E-08 116.87 0.04
1 gm / 8.91 mm 251 6.78E-09 11.69 0.00
0.1 gm / 4.14 mm 25 6.78E-10 1.17 0.00
0.01 gm / 1.92 mm 3 6.78E-11 0.12 0.00
0.001 gm / 0.89 mm 0 6.78E-12 0.01 0.00

Weight of pure Yakovenchukite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.70 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

Yakovenchukite-(Y) Classification

Help on Dana Class: Dana Class:

71.05.02.01 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.05)with other anions

(71.05.02)Dana Group

71.05.02.01 Yakovenchukite-(Y)! K3NaCaY2(Si12O30)•4H2O Pcca 2/m 2/m 2/m

Help on Strunz Class: Strunz Class:

09.EF.30 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EF -Single nets with 6-membered rings, � other rings

09.EF.30 Yakovenchukite-(Y)! K3NaCaY2(Si12O30)•4H2O Pcca 2/m 2/m 2/m

Other Yakovenchukite-(Y) Information

Help on References: References:

NAME( AmMin, v92:1525) PHYS. PROP.(AmMin, v92:1525) OPTIC PROP.(AmMin, v92:1525)

Help on See Also: See Also:

Links to other databases for Yakovenchukite-(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 Yakovenchukite-(Y) Specimen Label here :

Yakovenchukite-(Y)

K3NaCaY2(Si12O30)•4H2O
Dana No: 71.05.02.01 Strunz No: 09.EF.30
Locality:

Notes: