Mineralogy Database

Uranotungstite Mineral Data

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General Uranotungstite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Ba,Pb)(UO2)2WO4(OH)4•12(H2O)
Help on Composition: Composition: Molecular Weight = 1,167.54 gm
   Barium     3.53 %  Ba    3.94 % BaO
   Uranium   40.77 %  U    46.26 % UO2
   Iron       2.87 %  Fe    3.69 % FeO
   Hydrogen   2.42 %  H    21.60 % H2O
   Lead       1.77 %  Pb    1.91 % PbO
   Tungsten  15.75 %  W    19.86 % WO3
   Oxygen    32.89 %  O
            ______        ______ 
            100.00 %       97.26 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.6Ba0.3Pb0.1(UO2)2(WO4)(OH)4•12(H2O)
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Menzenschwand, and Clara mine, Wolfach, Schwarzwald, Baden-Wurttenberg, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Uranotungstite + Pronunciation Say URANOTUNGSTITE
 

Uranotungstite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6676:1:0.5191
Help on Cell Dimensions: Cell Dimensions: a = 9.22, b = 13.81, c = 7.17, Z = 2; V = 912.94 Den(Calc)= 4.25
Help on Crystal System: Crystal System: Orthorhombic Space Group: P 2221,Pccm,P mc21,Pcc2,Pmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.96(1), 3.21(0.7), 4.6(0.6),
 

Physical Properties of Uranotungstite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Brownish, Yellow, Yellow brown, Orange.
Help on Density: Density: 4.27
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: yellow
 

Optical Properties of Uranotungstite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.106 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.111 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1868,KPDmeas= 0.1859,KC= 0.1682
Ncalc = 1.71 - 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.682, b=1.845, g=1.855, bire=0.1730, 2V(Calc)=24, 2V(Meas)=42.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): yellow.
Help on Pleochroism (z): Pleochroism (z): yellow.
 

Calculated Properties of Uranotungstite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.79 gm/cc
note: Specific Gravity of Uranotungstite =4.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEUranotungstite =1,280.19 barns/electron
U=PEUranotungstite x relectron=4,856.14 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,087,527.87 (Gamma Ray American Petroleum Institute Units)
Concentration of Uranotungstite per GRapi unit = 323.88 (PPB)

Uranotungstite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 9.85 ± 2.46 grams of pure Uranotungstite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 985.15 ±246.29 grams of pure Uranotungstite .

Estimated Radioactivity from Uranotungstite - very strong
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 / 7.65 cm 72,986,106 1.97E-03 3,087,527.87 1,015.08
100 gm / 3.55 cm 7,298,611 1.97E-04 308,752.79 101.51
10 gm / 1.65 cm 729,861 1.97E-05 30,875.28 10.15
1 gm / 7.65 mm 72,986 1.97E-06 3,087.53 1.02
0.1 gm / 3.55 mm 7,299 1.97E-07 308.75 0.10
0.01 gm / 1.65 mm 730 1.97E-08 30.88 0.01
0.001 gm / 0.76 mm 73 1.97E-09 3.09 0.00

Weight of pure Uranotungstite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.27 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
 

Uranotungstite Classification

Help on  Dana Class: Dana Class: 49.03.05.01 (49)Basic and Hydrated Molybdates and Tungstates
  (49.03)(Hydrated, containing Hydroxyl or Halogen)
  (49.03.05)Dana Group
 
49.03.05.01 Uranotungstite (Fe,Ba,Pb)(UO2)2WO4(OH)4•12(H2O) P 2221,Pccm,P mc21,Pcc2,Pmm Ortho
Help on  Strunz Class: Strunz Class: 07.HB.25 07 - SULFATES (SELENATES, TELLURATES)
  07.H - Uranium and Uranyl Molybdates and Wolframates
  07.HB -With U6+
 
07.HB.25 Uranotungstite (Fe,Ba,Pb)(UO2)2WO4(OH)4•12(H2O) P 2221,Pccm,P mc21,Pcc2,Pmm Ortho
 

Other Uranotungstite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Uranotungstite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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Uranotungstite

(Fe++,Ba,Pb)(UO2)2WO4(OH)4•12(H2O)
Dana No: 49.03.05.01 Strunz No: 07.HB.25
Locality:

 

Notes:

 

 
   
 


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