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Yakovenchukite-(Y) Mineral Data

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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

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  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 - Dipyramidal H-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),
 

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
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For 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:

 

 
   
 


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