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Becquerelite Mineral Data

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General Becquerelite Information

Help on Chemical  Formula: Chemical Formula: Ca(UO2)6O4(OH)6•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,970.41 gm
   Calcium    2.03 %  Ca    2.85 % CaO
   Uranium   72.48 %  U    82.22 % UO2
   Hydrogen   1.13 %  H    10.06 % H2O
   Oxygen    24.36 %  O
            ______        ______ 
            100.00 %       95.13 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(UO2)6O4(OH)6•8(H2O)
Help on Environment: Environment: Sedimentary uranium deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1922
Help on Locality: Locality: Kasolo, Belgian Congo. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for French physicist Antoine Henri Becquerel (1852-1908), who discovered radioactivity in 1896.
Help on Name Pronunciation: Name Pronunciation: Becquerelite + Pronunciation Say BECQUERELITE
Help on Synonym: Synonym: ICSD 201364
  PDF 29-389
 

Becquerelite Image

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  Becquerelite

Comments: Yellow becquerelite crystals.
Location: Shinkolobwe mine, Tantara, Shaba, Dem. Repub. Congo. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Schoepite   Becquerelite

Comments: Bright yellow crystals of schoepite on transparent yellow becquerelite.
Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: .
© Lou Perloff / Photo Atlas of Minerals

Becquerelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1179:1:1.2056
Help on Cell Dimensions: Cell Dimensions: a = 13.8378, b = 12.3781, c = 14.9238, Z = 4; V = 2,556.23 Den(Calc)= 5.12
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pn21a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.44(1), 3.2(0.35), 3.73(0.3),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 2) ( 0 1 1) ( 0 1 0) ( 1 0 1) ( 3 0 5) ( 1 0 0) ( 2 1 0) ( 0 0 1)

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Physical Properties of Becquerelite

Help on Cleavage: Cleavage: {001} Perfect, {110} Perfect
Help on Color: Color: Brownish yellow, Golden yellow, Orange, Lemon.
Help on Density: Density: 5.14
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Resinous
Help on Streak: Streak: yellow
 

Optical Properties of Becquerelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.325 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.33 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1628,KPDmeas= 0.1621,KC= 0.1224
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.75, b=1.87, g=1.88, bire=0.1300
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): yellow.
Help on Pleochroism (z): Pleochroism (z): deep yellow.
 

Calculated Properties of Becquerelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.35 gm/cc
note: Specific Gravity of Becquerelite =5.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053647117
Boson Index = 0.9946352883
Help on Photoelectric: Photoelectric: PEBecquerelite =1,942.86 barns/electron
U=PEBecquerelite x relectron=8,453.68 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 5,229,959.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Becquerelite per GRapi unit = 191.21 (PPB)

Becquerelite 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) 5.82 ± 1.45 grams of pure Becquerelite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 581.59 ±145.40 grams of pure Becquerelite .

Estimated Radioactivity from Becquerelite - 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 / 7.19 cm 129,741,164 3.51E-03 5,229,959.93 1,719.44
100 gm / 3.34 cm 12,974,116 3.51E-04 522,995.99 171.94
10 gm / 1.55 cm 1,297,412 3.51E-05 52,299.60 17.19
1 gm / 7.19 mm 129,741 3.51E-06 5,229.96 1.72
0.1 gm / 3.34 mm 12,974 3.51E-07 523.00 0.17
0.01 gm / 1.55 mm 1,297 3.51E-08 52.30 0.02
0.001 gm / 0.72 mm 130 3.51E-09 5.23 0.00

Weight of pure Becquerelite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.14 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
 

Becquerelite Classification

Help on  Dana Class: Dana Class: 05.07.01.02 (05)Oxides Containing Uranium and Thorium
  (05.07)with alkaline or hydrated hydroxide components
  (05.07.01)Becquerelite Group
 
05.07.01.01 Compreignacite K2(UO2)6O4(OH)6•8(H2O) Pnmn 2/m 2/m 2/m
 
05.07.01.02 Becquerelite Ca(UO2)6O4(OH)6•8(H2O) Pn21a mm2
 
05.07.01.03 Billietite Ba(UO2)6O4(OH)6•8(H2O) Pbn21 mm2
Help on  Strunz Class: Strunz Class: 04.GB.10 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.10 Billietite Ba(UO2)6O4(OH)6•8(H2O) Pbn21 mm2
 
04.GB.10 Becquerelite Ca(UO2)6O4(OH)6•8(H2O) Pn21a mm2
 
04.GB.10 Protasite Ba(UO2)3O3(OH)2•3(H2O) Pn m
 

Other Becquerelite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Becquerelite :
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
16 - WWW-MINCRYST

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Print or Cut-and-Paste your Becquerelite Specimen Label here :

Becquerelite

Ca(UO2)6O4(OH)6•8(H2O)
Dana No: 05.07.01.02 Strunz No: 04.GB.10
Locality:

 

Notes:

 

 
   
 


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