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Lepersonnite-(Gd) Mineral Data

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General Lepersonnite-(Gd) Information

Help on Chemical  Formula: Chemical Formula: CaGd2(UO3)24(CO3)8(SiO4)4O4•60(H2O)
Help on Composition: Composition: Molecular Weight = 8,909.01 gm
   Calcium      0.32 %  Ca    0.45 % CaO
   Gadolinium   1.84 %  Gd    2.12 % Gd2O3
   Dysprosium   0.95 %  Dy    1.09 % Dy2O3
   Yttrium      0.32 %  Y     0.41 % Y2O3
   Terbium      0.11 %  Tb    0.12 % Tb2O3
   Uranium     63.99 %  U    76.89 % UO3
   Silicon      1.32 %  Si    2.82 % SiO2
   Hydrogen     1.36 %  H    12.11 % H2O
   Carbon       1.09 %  C     4.00 % CO2
   Oxygen      28.72 %  O
              ______        ______ 
              100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.71Gd1.04Dy0.52Y0.32Tb0.06U23.95C8.1Si4.18O100�59.9(H2O)
Help on Environment: Environment: In a black crust in the lower portion of the oxidation zone.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Shinkolobwe, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Jacques Lepersonne (1909-), honorary head of the Department of Geology and Mineralogy, Musee Royale de l'Afrique Centrale, Brussels, Belgium.
Help on Name Pronunciation: Name Pronunciation: Lepersonnite-(Gd) + Pronunciation Say LEPERSONNITE-(GD)
 

Lepersonnite-(Gd) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4189:1:0.3027
Help on Cell Dimensions: Cell Dimensions: a = 16.23, b = 38.74, c = 11.73, Z = 2; V = 7,375.24 Den(Calc)= 4.01
Help on Crystal System: Crystal System: Orthorhombic Space Group: Pnnm,Pnn2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.15(1), 3(0.8), 4.04(0.7),
 

Physical Properties of Lepersonnite-(Gd)

Help on Cleavage: Cleavage: {1} Good
Help on Color: Color: Bright yellow.
Help on Density: Density: 3.97
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Luminescence: Luminescence: Non-fluorescent and radioactive.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow
 

Optical Properties of Lepersonnite-(Gd)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.098 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1651,KPDmeas= 0.1668,KC= 0.1519
Ncalc = 1.6 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.638, b=1.666, g=1.682, bire=0.0440, 2V(Calc)=72, 2V(Meas)=73.
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (y): Pleochroism (y): bright yellow.
Help on Pleochroism (z): Pleochroism (z): bright yellow.
 

Calculated Properties of Lepersonnite-(Gd)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Lepersonnite-(Gd) =4.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PELepersonnite-(Gd) =1,706.79 barns/electron
U=PELepersonnite-(Gd) x relectron=5,901.57 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,705,731.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Lepersonnite-(Gd) per GRapi unit = 212.51 (PPB)

Lepersonnite-(Gd) 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) 6.46 ± 1.62 grams of pure Lepersonnite-(Gd) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 646.37 ±161.59 grams of pure Lepersonnite-(Gd) .

Estimated Radioactivity from Lepersonnite-(Gd) - 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 / 7.81 cm 114,605,128 3.10E-03 4,705,731.27 1,547.09
100 gm / 3.62 cm 11,460,513 3.10E-04 470,573.13 154.71
10 gm / 1.68 cm 1,146,051 3.10E-05 47,057.31 15.47
1 gm / 7.81 mm 114,605 3.10E-06 4,705.73 1.55
0.1 gm / 3.62 mm 11,461 3.10E-07 470.57 0.15
0.01 gm / 1.68 mm 1,146 3.10E-08 47.06 0.02
0.001 gm / 0.78 mm 115 3.10E-09 4.71 0.00

Weight of pure Lepersonnite-(Gd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.01 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
Estimated Thorium Activity ( 0.14 % Th) From Sum REE Elements ( 2.89 % REE)
 

Lepersonnite-(Gd) Classification

Help on  Dana Class: Dana Class: 17.01.12.01 (17)Compound Carbonates
  (17.01)with miscellaneous formulae
  (17.01.12)Dana Group
 
17.01.12.01 Lepersonnite-(Gd) CaGd2(UO3)24(CO3)8(SiO4)4O4•60(H2O) Pnnm,Pnn2 Ortho
Help on  Strunz Class: Strunz Class: 05.EG.10 05 - CARBONATES (NITRATES)
  05.E - Uranyl Carbonates
  05.EG -With SO4 or SiO4
 
05.EG.10 Lepersonnite-(Gd) CaGd2(UO3)24(CO3)8(SiO4)4O4•60(H2O) Pnnm,Pnn2 Ortho
 

Other Lepersonnite-(Gd) Information

Help on References: References: NAME( Dana8) 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 Lepersonnite-(Gd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Lepersonnite-(Gd) Specimen Label here :

Lepersonnite-(Gd)

CaGd2(UO3)24(CO3)8(SiO4)4O4•60(H2O)
Dana No: 17.01.12.01 Strunz No: 05.EG.10
Locality:

 

Notes:

 

 
   
 


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