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Yttrotungstite-(Ce) Mineral Data

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General Yttrotungstite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,Nd,Y)W2O6(OH)3
Help on Composition: Composition: Molecular Weight = 643.06 gm
   Cerium     10.89 %  Ce   12.76 % Ce2O3
   Yttrium     3.46 %  Y     4.39 % Y2O3
   Hydrogen    0.47 %  H     4.20 % H2O
   Tungsten   57.18 %  W    72.11 % WO3
   Neodymium   5.61 %  Nd    6.54 % Nd2O3
   Oxygen     22.39 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.5Nd0.25Y0.25W2O6(OH)3
Help on IMA Status: IMA Status: Approved IMA 1987 (Dana # Added)
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Yttrium, Tungsen).
Help on Name Pronunciation: Name Pronunciation: Yttrotungstite-(Ce) + Pronunciation Say YTTROTUNGSTITE-(CE)
 

Yttrotungstite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6751:1:0.8126
Help on Cell Dimensions: Cell Dimensions: a = 5.874, b = 8.7, c = 7.07, Z = 2; beta = 105.45° V = 348.25 Den(Calc)= 6.13
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.045(1), 2.273(0.52), 6.83(0.36),
 

Physical Properties of Yttrotungstite-(Ce)

Help on Color: Color: Yellow.
Help on Density: Density: 5.96
Help on Hardness: Hardness: 1 - Talc
 

Optical Properties of Yttrotungstite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.098 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1555,KPDmeas= 0.16,KC= 0.1724
Ncalc = 2.03 - 2.06
Help on Optical Data: Optical Data: Biaxial (?), a=1.89, b=1.95, g=2.02, bire=0.1300
 

Calculated Properties of Yttrotungstite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.13 gm/cc
note: Specific Gravity of Yttrotungstite-(Ce) =5.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEYttrotungstite-(Ce) = 814.11 barns/electron
U=PEYttrotungstite-(Ce) x relectron=4,176.30 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 15,150.53 (Gamma Ray American Petroleum Institute Units)
Concentration of Yttrotungstite-(Ce) per GRapi unit = 66.00 (PPM)

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

Estimated Radioactivity from Yttrotungstite-(Ce) - 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 / 6.84 cm 369,643 9.99E-06 15,150.53 4.98
100 gm / 3.18 cm 36,964 9.99E-07 1,515.05 0.50
10 gm / 1.47 cm 3,696 9.99E-08 151.51 0.05
1 gm / 6.84 mm 370 9.99E-09 15.15 0.00
0.1 gm / 3.18 mm 37 9.99E-10 1.52 0.00
0.01 gm / 1.47 mm 4 9.99E-11 0.15 0.00
0.001 gm / 0.68 mm 0 9.99E-12 0.02 0.00

Weight of pure Yttrotungstite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.96 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 ( 0.83 % Th) From Sum REE Elements (16.50 % REE)
 

Yttrotungstite-(Ce) Classification

Help on  Dana Class: Dana Class: 49.03.03.03 (49)Basic and Hydrated Molybdates and Tungstates
  (49.03)(Hydrated, containing Hydroxyl or Halogen)
  (49.03.03)Yttrotungstite Group
 
49.03.03.01 Cerotungstite-(Ce) (Ce,REE)W2O6(OH)3 P 21/m 2/m
 
49.03.03.02 Yttrotungstite-(Y) YW2O6(OH)3 P 21/m 2/m
 
49.03.03.03 Yttrotungstite-(Ce)! (Ce,Nd,Y)W2O6(OH)3 P 21/m 2/m
Help on  Strunz Class: Strunz Class: 04.FD.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FD -Hydroxides with OH, without H2O; chains of edge-sharing octahedra
 
04.FD.20 Cerotungstite-(Ce) (Ce,REE)W2O6(OH)3 P 21/m 2/m
 
04.FD.20 Yttrotungstite-(Ce)! (Ce,Nd,Y)W2O6(OH)3 P 21/m 2/m
 
04.FD.20 Yttrotungstite-(Y) YW2O6(OH)3 P 21/m 2/m
 

Other Yttrotungstite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Yttrotungstite-(Ce) :
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 Yttrotungstite-(Ce) Specimen Label here :

Yttrotungstite-(Ce)

(Ce,Nd,Y)W2O6(OH)3
Dana No: 49.03.03.03 Strunz No: 04.FD.20
Locality:

 

Notes:

 

 
   
 


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