Seelite-1 Mineral Data

General Seelite-1 Information

Chemical Formula:

Mg[(UO2)(AsO3)x(AsO4)1-x]2•7(H2O)

Composition:

Molecular Weight = 620.82 gm

Magnesium 3.91 % Mg 6.49 % MgO

Uranium 38.34 % U 43.50 % UO₂

Arsenic 18.10 % As 7.97 % As₂O₃ / 18.51 % As₂O₅

Hydrogen 2.27 % H 20.31 % H₂O

Oxygen 37.37 % O

______ ______

100.00 % 96.78 % = TOTAL OXIDE

Empirical Formula:

Mg(UO₂)(AsO₃)_0.52(AsO₄)_0.5•7(H₂O)

Environment:

Oxidation zone mineral.

IMA Status:

Approved IMA 1993

Locality:

Talmissi mine, 35 km W of Amarak, Central Iran and the Rabejac uranium deposit, Lodeve, Herault, France. Link to MinDat.org Location Data.

Name Origin:

Named for Paul (1904-1982) and Hilde (1901-1987) Seel, Belgium mineral collectors.

Name Pronunciation:

Seelite-1

Synonym:

IMA1992-005

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Seelite-1 Crystallography

Axial Ratios:

a:b:c =2.5781:1:0.9432

Cell Dimensions:

a = 18.207, b = 7.062, c = 6.661, Z = 3; beta = 99.65° V = 844.34 Den(Calc)= 3.66

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 9.05(1), 1.92(0.8), 4.44(0.8),

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Forms: ( 0 1 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Seelite-1

Color:

Yellow.

Density:

3.7

Diaphaneity:

Transparent to Translucent

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Optical Properties of Seelite-1

Gladstone-Dale:

CI meas= -0.078 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.09 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.19,KPDmeas= 0.1879,KC= 0.1743
Ncalc = 1.64

Optical Data:

Biaxial (-), a=1.602-1.61, b=1.73-1.737, g=1.74-1.753, bire=0.1380-0.1430

Calculated Properties of Seelite-1

Electron Density:

Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Seelite-1 =3.70 gm/cc.

Fermion Index:

Fermion Index = 0.006858331
Boson Index = 0.993141669

Photoelectric:

PE_Seelite-1= 965.43 barns/electron
U=PE_Seelite-1 x r_electron=3,262.42 barns/cc.

Radioactivity:

GRapi = 2,984,810.91 (Gamma Ray American Petroleum Institute Units)
Concentration of Seelite-1 per GRapi unit = 335.03 (PPB)

Seelite-1 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) 10.19 ± 2.55 grams of pure Seelite-1 .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1019.0 ±254.76 grams of pure Seelite-1 .

**Estimated Radioactivity from Seelite-1** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (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	68,630,615	1.85E-03	2,984,810.91	981.31
100 gm / 3.72 cm	6,863,062	1.85E-04	298,481.09	98.13
10 gm / 1.73 cm	686,306	1.85E-05	29,848.11	9.81
1 gm / 8.02 mm	68,631	1.85E-06	2,984.81	0.98
0.1 gm / 3.72 mm	6,863	1.85E-07	298.48	0.10
0.01 gm / 1.73 mm	686	1.85E-08	29.85	0.01
0.001 gm / 0.80 mm	69	1.85E-09	2.98	0.00

Weight of pure Seelite-1 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-1 Classification

Dana Class:

40.02a.12.01 (40)Hydrated Phosphates, etc

(40.02a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.02a.12)Dana Group

40.02a.12.01 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2•7(H2O) C 2/m 2/m

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-1 Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p1012,1994) OPTIC PROP.(Am.Min.,Vol.79,p1012,1994)

See Also:

Links to other databases for Seelite-1 :
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-1 Specimen Label here :

Seelite-1

Mg[(UO2)(AsO3)x(AsO4)1-x]2•7(H2O)
Dana No: 40.02a.12.01 Strunz No: 04.JD.10
Locality:

Notes: