Mineralogy Database

Moreauite Mineral Data

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General Moreauite Information

Help on Chemical  Formula: Chemical Formula: Al3(UO2)(PO4)3(OH)2•13(H2O)
Help on Composition: Composition: Molecular Weight = 904.10 gm
   Uranium     26.33 %  U    29.87 % UO2
   Aluminum     8.95 %  Al   16.92 % Al2O3
   Phosphorus  10.28 %  P    23.55 % P2O5
   Hydrogen     3.12 %  H    27.90 % H2O
   Oxygen      51.32 %  O
              ______        ______ 
              100.00 %       98.23 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al3(UO2)(PO4)3(OH)2•13(H2O)
Help on Environment: Environment: Rare secondary mineral in the oxidized uraniferous zone of a complex granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Kobokobo pegmatite, Lusungu River district, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jules Moreau (1931- ), Belgian mineralogist, Catholic University of Louvain, Louvain, Belgium.
Help on Name Pronunciation: Name Pronunciation: Moreauite + Pronunciation Say MOREAUITE
 

Moreauite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0918:1:0.8554
Help on Cell Dimensions: Cell Dimensions: a = 23.41, b = 21.44, c = 18.34, Z = 16; beta = 92° V = 9,199.43 Den(Calc)= 2.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.8(1), 11.69(0.8), 2.931(0.7),
 

Physical Properties of Moreauite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Greenish yellow, Light yellow.
Help on Density: Density: 2.64
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Streak: Streak: light yellow
 

Optical Properties of Moreauite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2107,KPDmeas= 0.2083,KC= 0.2028
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.54, b=1.552, g=1.558, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70.
 

Calculated Properties of Moreauite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.55 gm/cc
note: Specific Gravity of Moreauite =2.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0021466139
Boson Index = 0.9978533861
Help on Photoelectric: Photoelectric: PEMoreauite = 620.17 barns/electron
U=PEMoreauite x relectron=1,579.13 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,164,448.42 (Gamma Ray American Petroleum Institute Units)
Concentration of Moreauite per GRapi unit = 462.01 (PPB)

Moreauite 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) 14.05 ± 3.51 grams of pure Moreauite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1405.3 ±351.32 grams of pure Moreauite .

Estimated Radioactivity from Moreauite - 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 / 8.98 cm 47,126,630 1.27E-03 2,164,448.42 711.60
100 gm / 4.17 cm 4,712,663 1.27E-04 216,444.84 71.16
10 gm / 1.93 cm 471,266 1.27E-05 21,644.48 7.12
1 gm / 8.98 mm 47,127 1.27E-06 2,164.45 0.71
0.1 gm / 4.17 mm 4,713 1.27E-07 216.44 0.07
0.01 gm / 1.93 mm 471 1.27E-08 21.64 0.01
0.001 gm / 0.90 mm 47 1.27E-09 2.16 0.00

Weight of pure Moreauite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.64 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
 

Moreauite Classification

Help on  Dana Class: Dana Class: 42.12.03.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.12)with miscellaneous formulae
  (42.12.03)Dana Group
 
42.12.03.01 Moreauite Al3(UO2)(PO4)3(OH)2•13(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.ED.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.ED -Unclassified
 
08.ED.05 Moreauite Al3(UO2)(PO4)3(OH)2•13(H2O) P 21/c 2/m
 

Other Moreauite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Moreauite :
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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Print or Cut-and-Paste your Moreauite Specimen Label here :

Moreauite

Al3(UO2)(PO4)3(OH)2•13(H2O)
Dana No: 42.12.03.01 Strunz No: 08.ED.05
Locality:

 

Notes:

 

 
   
 


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