Mineralogy Database

Cerotungstite-(Ce) Mineral Data

Search Webmineral :
  
Advertisment

General Cerotungstite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,REE)W2O6(OH)3
Help on Composition: Composition: Molecular Weight = 655.80 gm
   Cerium           16.02 %  Ce   18.77 % Ce2O3
   La,Ce,Pr,Nd,Sm,   5.49 %  RE    6.40 % REE2O3
   Hydrogen          0.46 %  H     4.12 % H2O
   Tungsten         56.07 %  W    70.71 % WO3
   Oxygen           21.96 %  O
                   ______        ______ 
                   100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.75REE0.25W2O6(OH)3
Help on Environment: Environment: In oxidized tungsten deposits.
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Kirwa and Nyamulilo mines, Kigezi district, Uganda. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
 

Cerotungstite-(Ce) Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Anthoinite   Cerotungstite-(Ce)   Ferberite

Comments: Yellow cerotungstite-(Ce), with black ferberite veins and whitish anthoinite.
Location: Bugarama, Rwanda. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cerotungstite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8126:1:0.6751
Help on Cell Dimensions: Cell Dimensions: a = 7.07, b = 8.7, c = 5.874, Z = 2; beta = 105.45° V = 348.25 Den(Calc)= 6.25
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): 3.41(1), 2.27(0.5), 6.83(0.4),1.767(0.2), 2.63(0.2), 3.34(0.2),
 

Physical Properties of Cerotungstite-(Ce)

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Yellow orange, Orange yellow.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1 - Talc
Help on Streak: Streak: yellow
 

Optical Properties of Cerotungstite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.104 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1525,KC= 0.1703
Ncalc = 2.06
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.89, b=1.95, g=2.02, bire=0.1300
 

Calculated Properties of Cerotungstite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.37 gm/cc
note: Specific Gravity of Cerotungstite-(Ce) =6.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PECerotungstite-(Ce) = 826.38 barns/electron
U=PECerotungstite-(Ce) x relectron=4,437.91 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 19,735.86 (Gamma Ray American Petroleum Institute Units)
Concentration of Cerotungstite-(Ce) per GRapi unit = 50.67 (PPM)

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

Estimated Radioactivity from Cerotungstite-(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 / 6.74 cm 482,343 1.30E-05 19,735.86 6.49
100 gm / 3.13 cm 48,234 1.30E-06 1,973.59 0.65
10 gm / 1.45 cm 4,823 1.30E-07 197.36 0.06
1 gm / 6.74 mm 482 1.30E-08 19.74 0.01
0.1 gm / 3.13 mm 48 1.30E-09 1.97 0.00
0.01 gm / 1.45 mm 5 1.30E-10 0.20 0.00
0.001 gm / 0.67 mm 0 1.30E-11 0.02 0.00

Weight of pure Cerotungstite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.25 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 ( 1.08 % Th) From Sum REE Elements (21.51 % REE)
 

Cerotungstite-(Ce) Classification

Help on  Dana Class: Dana Class: 49.03.03.01 (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 Cerotungstite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Cerotungstite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Cerotungstite-(Ce) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Cerotungstite-(Ce) :

Ask about Cerotungstite-(Ce) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Cerotungstite-(Ce) Specimen Label here :

Cerotungstite-(Ce)

(Ce,REE)W2O6(OH)3
Dana No: 49.03.03.01 Strunz No: 04.FD.20
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.