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Bauranoite Mineral Data

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General Bauranoite Information

Help on Chemical  Formula: Chemical Formula: BaU2O7•4-5(H2O)
Help on Composition: Composition: Molecular Weight = 806.45 gm
   Barium    17.03 %  Ba   19.01 % BaO
   Uranium   59.03 %  U    66.97 % UO2
   Hydrogen   1.12 %  H    10.05 % H2O
   Oxygen    22.82 %  O
            ______        ______ 
            100.00 %       96.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaU2O7•4.5(H2O)
Help on Environment: Environment: Secondary mineral replacing uraninite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: U-Mo deposit in Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition of (Ba)(Urano)ite.
Help on Name Pronunciation: Name Pronunciation: Bauranoite + Pronunciation Say BAURANOITE
 

Bauranoite Image

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  Bauranoite

Comments: Massive, orange-brown crystalline aggregate of bauranoite.
Location: Strel'tsovskoye ore field, Krasnokamensk, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Bauranoite Crystallography

Help on Crystal System: Crystal System: Triclinic Space Group: Triclinic ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 3.41(0.7), 1.98(0.6),1.667(0.6), 1.723(0.6), 1.908(0.6), 1.948(0.6), 1.325(0.5),
 

Physical Properties of Bauranoite

Help on Color: Color: Reddish brown.
Help on Density: Density: 5.28 - 5.42, Average = 5.35
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5 - Apatite
 

Optical Properties of Bauranoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.37 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1719,KC= 0.1255
Ncalc = 1.66 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.911-1.916, g=1.92-1.932, bire=0.0090-0.0160, 2V(Meas)=81.
 

Calculated Properties of Bauranoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.52 gm/cc
note: Specific Gravity of Bauranoite =5.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEBauranoite =1,664.39 barns/electron
U=PEBauranoite x relectron=7,530.39 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,255,235.41 (Gamma Ray American Petroleum Institute Units)
Concentration of Bauranoite per GRapi unit = 235.00 (PPB)

Bauranoite 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) 7.15 ± 1.79 grams of pure Bauranoite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 714.81 ±178.70 grams of pure Bauranoite .

Estimated Radioactivity from Bauranoite - 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 / 7.09 cm 105,666,084 2.86E-03 4,255,235.41 1,398.98
100 gm / 3.29 cm 10,566,608 2.86E-04 425,523.54 139.90
10 gm / 1.53 cm 1,056,661 2.86E-05 42,552.35 13.99
1 gm / 7.09 mm 105,666 2.86E-06 4,255.24 1.40
0.1 gm / 3.29 mm 10,567 2.86E-07 425.52 0.14
0.01 gm / 1.53 mm 1,057 2.86E-08 42.55 0.01
0.001 gm / 0.71 mm 106 2.86E-09 4.26 0.00

Weight of pure Bauranoite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.35 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
 

Bauranoite Classification

Help on  Dana Class: Dana Class: 05.04.02.02 (05)Oxides Containing Uranium and Thorium
  (05.04)with alkaline-earth elements (hydrated)
  (05.04.02)Uranoite Series
 
05.04.02.01 Calciouranoite (Ca,Ba,Pb)U2O7•5(H2O) Unk Tri
 
05.04.02.02 Bauranoite BaU2O7•4-5(H2O) Triclinic ? Tri
Help on  Strunz Class: Strunz Class: 04.GB.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
 
04.GB.20 Calciouranoite (Ca,Ba,Pb)U2O7•5(H2O) Unk Tri
 
04.GB.20 Bauranoite BaU2O7•4-5(H2O) Triclinic ? Tri
 
04.GB.20 Metacalciouranoite (Ca,Na,Ba)U2O7•2(H2O) Ortho ? Ortho
 

Other Bauranoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Bauranoite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - Uranium Minerals

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Bauranoite

BaU2O7•4-5(H2O)
Dana No: 05.04.02.02 Strunz No: 04.GB.20
Locality:

 

Notes:

 

 
   
 


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