Cerotungstite-(Ce) Mineral Data


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General Cerotungstite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: CeW2O6(OH)3
Help on Composition: Composition: Molecular Weight = 654.83 gm
   Cerium    21.40 %  Ce   25.06 % Ce2O3
   Hydrogen   0.46 %  H     4.13 % H2O
   Tungsten  56.15 %  W    70.81 % WO3
   Oxygen    21.99 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CeW2O6(OH)3
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

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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)= 6.24
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= 0.108 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1528,KC= 0.1712
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:

relectron=5.36 gm/cc
note: rCerotungstite-(Ce) =6.24 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.08029
Boson Index = 0.91971
Help on Photoelectric: Photoelectric:

PECerotungstite-(Ce) = 821.07 barns/electron
U=PECerotungstite-(Ce) x relectron=4,397.15 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 19,587.91 (Gamma Ray American Petroleum Institute Units)

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 479,294 1.30E-05 19,587.91 6.44
100 gm / 3.13 cm 47,929 1.30E-06 1,958.79 0.64
10 gm / 1.45 cm 4,793 1.30E-07 195.88 0.06
1 gm / 6.74 mm 479 1.30E-08 19.59 0.01
0.1 gm / 3.13 mm 48 1.30E-09 1.96 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 6.24 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 ( 1.07 % Th) From Sum REE Elements (21.40 % REE)
 

Cerotungstite-(Ce) Classification

Help on  Dana Class: Dana Class: 49.3.3.1 (49)Basic and Hydrated Molybdates and Tungstates
  (49.3)(Hydrated, containing Hydroxyl or Halogen)
  (49.3.3)Dana Group
 
49.3.3.1 Cerotungstite-(Ce) CeW2O6(OH)3 P 21/m 2/m
 
49.3.3.2 Yttrotungstite-(Y) YW2O6(OH)3 P 21/m 2/m
 
49.3.3.3 Yttrotungstite-(Ce)! (Ce,Nd,Y)W2O6(OH)3 P 21/m 2/m
Help on  Strunz Class: Strunz Class: IV/E.02-80 IV - Oxides
  IV/E - Oxides with metal : oxygen < 1:2 (M2O5, MO3)
  IV/E.02 - Tungstite - Cerotungstite-(Ce) series
 
IV/E.02-10 Tungstite WO3·(H2O) Pmnb 2/m 2/m 2/m
 
IV/E.02-20 Meymacite WO3·2(H2O) None
 
IV/E.02-30 Hydrotungstite H2WO4·(H2O) P 2/m 2/m
 
IV/E.02-40 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic
 
IV/E.02-50 Anthoinite AlWO3(OH)3 P1 or P1 Tri
 
IV/E.02-60 Mpororoite Al(WO3)(OH)3·2(H2O) P1 or P1 Tri
 
IV/E.02-70 Yttrotungstite-(Y) YW2O6(OH)3 P 21/m 2/m
 
IV/E.02-75 Yttrotungstite-(Ce)! (Ce,Nd,Y)W2O6(OH)3 P 21/m 2/m
 
IV/E.02-80 Cerotungstite-(Ce) CeW2O6(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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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

Cerotungstite-(Ce)

CeW2O6(OH)3
Dana No: 49.3.3.1 Strunz No: IV/E.02-80
Locality:

 

Notes:

 

 
   
 
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