Uranotungstite Mineral Data

Uranotungstite Mineral Data +

General Uranotungstite Information

Chemical Formula:

(Fe++,Ba,Pb)(UO2)2WO4(OH)4·12(H2O)

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

Empirical Formula:

Fe²⁺_0.6Ba_0.3Pb_0.1(UO₂)₂(WO₄)(OH)₄·12(H₂O)

IMA Status:

Approved IMA 1985

Locality:

Menzenschwand, and Clara mine, Wolfach, Schwarzwald, Baden-Wurttenberg, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the composition.

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Uranotungstite Crystallography

Axial Ratios:

a:b:c =0.6676:1:0.5191

Cell Dimensions:

a = 9.22, b = 13.81, c = 7.17, Z = 2; V = 912.94 Den(Calc)= 4.25

Crystal System:

OrthorhombicSpace Group: P 222₁,Pccm,P mc2₁,Pcc2,Pmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.96(1), 3.21(0.7), 4.6(0.6),

Physical Properties of Uranotungstite

Cleavage:

[010] Perfect

Color:

Brownish, Yellow, Yellow brown, Orange.

Density:

4.27

Diaphaniety:

Translucent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

yellow

Optical Properties of Uranotungstite

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

Optical Data:

Biaxial (-), a=1.682, b=1.845, g=1.855, bire=0.1730, 2V(Calc)=24, 2V(Meas)=42.

Pleochroism (x):

colorless.

Pleochroism (y):

yellow.

Pleochroism (z):

yellow.

Calculated Properties of Uranotungstite

Electron Density:

r_electron=3.79 gm/cc
note: r_{Uranotungstite}=4.27 gm/cc.

Fermion Index

Fermion Index = 0.0364
Boson Index = 0.9636

Photoelectric:

PE_{Uranotungstite}=1,280.19 barns/electron
U=PE_{Uranotungstite} x r_electron=4,856.13 barns/cc.

Radioactivity:

GRapi = 3,087,526.51 (Gamma Ray American Petroleum Institute Units)

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	72,986,104	1.97E-03	3,087,526.51	1,015.08
100 gm / 3.55 cm	7,298,610	1.97E-04	308,752.65	101.51
10 gm / 1.65 cm	729,861	1.97E-05	30,875.27	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

Dana Class:

49.3.5.1 (49)Basic and Hydrated Molybdates and Tungstates

(49.3)(Hydrated, containing Hydroxyl or Halogen)

(49.3.5)Dana Group

49.3.5.1 Uranotungstite (Fe,Ba,Pb)(UO2)2WO4(OH)4·12(H2O) P 222₁,Pccm,P mc2₁,Pcc2,Pmm Ortho

Strunz Class:

VI/G.07-10 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/G - Uranylmolybdates with [UO2]4+ - [MoO4]2-

VI/G.07 - Uranotungstite series

VI/G.07-10 Uranotungstite (Fe,Ba,Pb)(UO2)2WO4(OH)4·12(H2O) P 222₁,Pccm,P mc2₁,Pcc2,Pmm Ortho

Other Uranotungstite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Uranotungstite :
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 12 - Uranium Minerals 13 -École des Mines de Paris

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Uranotungstite

(Fe++,Ba,Pb)(UO2)2WO4(OH)4·12(H2O)
Dana No: 49.3.5.1 Strunz No: VI/G.07-10
Locality:

Notes: