Mineralogy Database

Seelite-2 Mineral Data

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General Seelite-2 Information

Help on Chemical  Formula: Chemical Formula: Mg(UO2)(AsO3)x(AsO4)1-x•7(H2O) (x=0.7)
Help on Composition: Composition: Molecular Weight = 548.16 gm
   Magnesium   4.43 %  Mg    7.35 % MgO
   Uranium    43.42 %  U    49.26 % UO2
   Arsenic    13.67 %  As   12.63 % As2O3 /  6.29 % As2O5
   Hydrogen    2.57 %  H    23.01 % H2O
   Oxygen     35.90 %  O
             ______        ______ 
             100.00 %       98.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(UO2)(AsO3)0.7(AsO4)0.3•7(H2O)
Help on Environment: Environment: Oxidized zone mineral.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Talmissi mine, 35 km W of Amarak, Central Iran and the Rabejac uranium deposit, Lodeve, Herault, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Paul (1904-1982) and Hilde (1901-1987) Seel, Belgium mineral collectors.
Help on Name Pronunciation: Name Pronunciation: Seelite-2 Say SEELITE-2
Help on Synonym: Synonym: IMA1992-005
 

Seelite-2 Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.5781:1:0.9432
Help on Cell Dimensions: Cell Dimensions: a = 18.207, b = 7.062, c = 6.661, Z = 3; beta = 99.65° V = 844.34 Den(Calc)= 3.23
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.05(1), 1.92(0.8), 4.44(0.8),
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: ( 0 1 1) ( 1 0 0) ( 0 0 1)

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

 

Physical Properties of Seelite-2

Help on Color: Color: Yellow.
Help on Density: Density: 3.7
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Seelite-2

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.182 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2153,KPDmeas= 0.1879,KC= 0.1821
Ncalc = 1.59 - 1.67
Help on Optical Data: Optical Data: Biaxial (-), a=1.602-1.61, b=1.73-1.737, g=1.74-1.753, bire=0.1380-0.1430, 2V(Calc)=28-36, 2V(Meas)=30-41.
 

Calculated Properties of Seelite-2

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Seelite-2 =3.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077365929
Boson Index = 0.9922634071
Help on Photoelectric: Photoelectric: PESeelite-2 =1,092.55 barns/electron
U=PESeelite-2 x relectron=3,678.45 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,368,032.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Seelite-2 per GRapi unit = 296.91 (PPB)

Seelite-2 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) 9.03 ± 2.26 grams of pure Seelite-2 .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 903.10 ±225.77 grams of pure Seelite-2 .

Estimated Radioactivity from Seelite-2 - 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 / 8.02 cm 77,727,724 2.10E-03 3,368,032.94 1,107.30
100 gm / 3.72 cm 7,772,772 2.10E-04 336,803.29 110.73
10 gm / 1.73 cm 777,277 2.10E-05 33,680.33 11.07
1 gm / 8.02 mm 77,728 2.10E-06 3,368.03 1.11
0.1 gm / 3.72 mm 7,773 2.10E-07 336.80 0.11
0.01 gm / 1.73 mm 777 2.10E-08 33.68 0.01
0.001 gm / 0.80 mm 78 2.10E-09 3.37 0.00

Weight of pure Seelite-2 in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.70 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
 

Seelite-2 Classification

Help on  Dana Class: Dana Class: 46.02.09.01 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.02)with miscellaneous formulae
  (46.02.09)Dana Group
 
46.02.09.01 Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x•7(H2O)(x=0.7) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.JD.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JD -Arsenites, antimonites, bismuthites; with additional anions, with H2O
 
04.JD.10 Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x•7(H2O)(x=0.7) C 2/m 2/m
 
04.JD.10 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2•7(H2O) C 2/m 2/m
 

Other Seelite-2 Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p1012,1994) OPTIC PROP.(Am.Min.,Vol.79,p1012,1994)
Help on See Also: See Also: Links to other databases for Seelite-2 :
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
11 - Uranium Minerals

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Print or Cut-and-Paste your Seelite-2 Specimen Label here :

Seelite-2

Mg(UO2)(AsO3)x(AsO4)1-x•7(H2O) (x=0.7)
Dana No: 46.02.09.01 Strunz No: 04.JD.10
Locality:

 

Notes:

 

 
   
 


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