Mineralogy Database

Uranosphaerite Mineral Data

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General Uranosphaerite Information

Help on Chemical  Formula: Chemical Formula: Bi(UO2)O2(OH)
Help on Composition: Composition: Molecular Weight = 528.01 gm
   Uranium   45.08 %  U    51.14 % UO2
   Bismuth   39.58 %  Bi   44.12 % Bi2O3
   Hydrogen   0.19 %  H     1.71 % H2O
   Oxygen    15.15 %  O
            ______        ______ 
            100.00 %       96.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi(UO2)O2(OH)
Help on Environment: Environment: Oxidic zone of "gummite" alteration of uraninite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1873
Help on Locality: Locality: Shinkolobwe, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the compostition uranium and the Greek for sphere, in allusion to its globular forms.
Help on Name Pronunciation: Name Pronunciation: Uranosphaerite + Pronunciation Say URANOSPHAERITE

Uranosphaerite Image

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Comments: Yellow-orange earthy uranosphaerite crusts.
Location: Kersegalec en Lignol, Vendee, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uranosphaerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9677:1:0.9848
Help on Cell Dimensions: Cell Dimensions: a = 7.559, b = 7.811, c = 7.693, Z = 4; beta = 92.88° V = 453.65 Den(Calc)= 7.73
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 1.83(0.8), 3.87(0.7),

Physical Properties of Uranosphaerite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Orange, Red orange, Brick red.
Help on Density: Density: 6.36
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: yellow

Optical Properties of Uranosphaerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.263 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1294,KPDmeas= 0.1572,KC= 0.1244
Ncalc = 1.79 - 1.96
Help on Optical Data: Optical Data: Biaxial (+), a=1.959, b=1.981, g=2.06, bire=0.1010, 2V(Calc)=58, 2V(Meas)=56. Dispersion strong, r < v.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Uranosphaerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.32 gm/cc
note: Specific Gravity of Uranosphaerite =7.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0033191658
Boson Index = 0.9966808342
Help on Photoelectric: Photoelectric: PEUranosphaerite =2,028.56 barns/electron
U=PEUranosphaerite x relectron=12829.37 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,143,807.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Uranosphaerite per GRapi unit = 318.09 (PPB)

Uranosphaerite 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) 9.68 ± 2.42 grams of pure Uranosphaerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 967.51 ±241.88 grams of pure Uranosphaerite .

Estimated Radioactivity from Uranosphaerite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 6.27 cm 80,693,227 2.18E-03 3,143,807.17 1,033.58
100 gm / 2.91 cm 8,069,323 2.18E-04 314,380.72 103.36
10 gm / 1.35 cm 806,932 2.18E-05 31,438.07 10.34
1 gm / 6.27 mm 80,693 2.18E-06 3,143.81 1.03
0.1 gm / 2.91 mm 8,069 2.18E-07 314.38 0.10
0.01 gm / 1.35 mm 807 2.18E-08 31.44 0.01
0.001 gm / 0.63 mm 81 2.18E-09 3.14 0.00

Weight of pure Uranosphaerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 7.73 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

Uranosphaerite Classification

Help on  Dana Class: Dana Class: (05)Oxides Containing Uranium and Thorium
  (05.09)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl
  (05.09.01)Dana Group Uranosphaerite Bi(UO2)O2(OH) P 21/n 2/m
Help on  Strunz Class: Strunz Class: 04.GB.65 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.65 Uranosphaerite Bi(UO2)O2(OH) P 21/n 2/m

Other Uranosphaerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, CanMin v 41, p 677) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Uranosphaerite :
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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Dana No: Strunz No: 04.GB.65





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