Mineralogy Database

Fourmarierite Mineral Data

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General Fourmarierite Information

Help on Chemical  Formula: Chemical Formula: Pb(UO2)4O3(OH)4•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,475.40 gm
   Uranium   64.53 %  U    73.21 % UO2
   Hydrogen   0.82 %  H     7.33 % H2O
   Lead      14.04 %  Pb   15.13 % PbO
   Oxygen    20.60 %  O
            ______        ______ 
            100.00 %       95.66 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb(UO2)4O3(OH)4•4(H2O)
Help on Environment: Environment: Secondary uranium-lead mineral altering from uraninite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Paul Fourmarier(1877-1970, Belgian geologist and Professor of Geology at the University of Liege, Belgium.
Help on Name Pronunciation: Name Pronunciation: Fourmarierite + Pronunciation Say FOURMARIERITE
Help on Synonym: Synonym: ICSD 61441
  PDF 13-16
 

Fourmarierite Image

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  Fourmarierite

Comments: Thick tabular orange crystals of fourmarierite.
Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Fourmarierite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8528:1:0.8715
Help on Cell Dimensions: Cell Dimensions: a = 13.986, b = 16.4, c = 14.293, Z = 8; V = 3,278.39 Den(Calc)= 5.98
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Bb21m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.2(1), 3.18(0.5), 3.58(0.5),
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 1 1) ( 1 0 1) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Fourmarierite

Help on Cleavage: Cleavage: {001} Perfect, {100} Indistinct
Help on Color: Color: Brown, Carmine red, Pink orange, Red, Reddish brown.
Help on Density: Density: 5.74 - 6.05, Average = 5.89
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Radioactive.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: orange
 

Optical Properties of Fourmarierite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.286 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.268 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1499,KPDmeas= 0.1521,KC= 0.1182
Ncalc = 1.68 - 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.85-1.865, b=1.885-1.92, g=1.89-1.97, bire=0.0400-0.1050, 2V(Calc)=40-84, 2V(Meas)=50-55. Dispersion r > v strong.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): pale amber yellow.
Help on Pleochroism (z): Pleochroism (z): amber yellow.
 

Calculated Properties of Fourmarierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.98 gm/cc
note: Specific Gravity of Fourmarierite =5.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEFourmarierite =2,018.08 barns/electron
U=PEFourmarierite x relectron=10044.49 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,578,281.91 (Gamma Ray American Petroleum Institute Units)
Concentration of Fourmarierite per GRapi unit = 218.42 (PPB)

Fourmarierite 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) 6.64 ± 1.66 grams of pure Fourmarierite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 664.37 ±166.09 grams of pure Fourmarierite .

Estimated Radioactivity from Fourmarierite - 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 / 6.84 cm 115,513,591 3.12E-03 4,578,281.91 1,505.19
100 gm / 3.17 cm 11,551,359 3.12E-04 457,828.19 150.52
10 gm / 1.47 cm 1,155,136 3.12E-05 45,782.82 15.05
1 gm / 6.84 mm 115,514 3.12E-06 4,578.28 1.51
0.1 gm / 3.17 mm 11,551 3.12E-07 457.83 0.15
0.01 gm / 1.47 mm 1,155 3.12E-08 45.78 0.02
0.001 gm / 0.68 mm 116 3.12E-09 4.58 0.00

Weight of pure Fourmarierite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.98 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
 

Fourmarierite Classification

Help on  Dana Class: Dana Class: 05.09.02.01 (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
  (05.09.02)Dana Group
 
05.09.02.01 Fourmarierite Pb(UO2)4O3(OH)4•4(H2O) Bb21m mm2
Help on  Strunz Class: Strunz Class: 04.GB.25 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.25 Fourmarierite Pb(UO2)4O3(OH)4•4(H2O) Bb21m mm2
 

Other Fourmarierite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Fourmarierite :
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 Fourmarierite Specimen Label here :

Fourmarierite

Pb(UO2)4O3(OH)4•4(H2O)
Dana No: 05.09.02.01 Strunz No: 04.GB.25
Locality:

 

Notes:

 

 
   
 


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