Cerotungstite-(Ce)  Mineral Data

Cerotungstite-(Ce) Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.
Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.
McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs
Hudson Institute of Mineralogy

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 Cerotungstite-(Ce) Image in a New Browser Window Images:
Click Here for Larger Cerotungstite-(Ce) Image

Cerotungstite-(Ce)   Anthoinite   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 - PrismaticH-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
Becquerels
(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) :

A Bijoux Google Search for Cerotungstite-(Ce)
Adam's Minerals Google Search for Cerotungstite-(Ce)
Cape Minerals Google Search for Cerotungstite-(Ce)
Dakota Matrix Minerals Google Search for Cerotungstite-(Ce)
Excalibur Mineral Corp. Google Search for Cerotungstite-(Ce)
Exceptional Minerals Google Search for Cerotungstite-(Ce)
John Betts Fine Minerals Search for Cerotungstite-(Ce)
McDougall Minerals Google Search for Cerotungstite-(Ce)
Mineral News Website Link
Rock and Mineral Shows Google Search for Cerotungstite-(Ce)
Weinrich Minerals, Inc. Google Search 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: