General Seelite-2 Information
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Chemical Formula: |
Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O) (x=0.7) |
Composition: |
Molecular Weight = 548.16 gm |
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Magnesium 4.43 % Mg 7.35 % MgO |
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Uranium 43.42 % U 49.26 % UO2 |
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Arsenic 13.67 % As 12.63 % As2O3 / 6.29 % As2O5 |
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Hydrogen 2.57 % H 23.01 % H2O |
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Oxygen 35.90 % O |
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______ ______ |
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100.00 % 98.54 % = TOTAL OXIDE |
Empirical Formula: |
Mg(UO2)(AsO3)0.7(AsO4)0.3·7(H2O) |
Environment: |
Oxidized 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. |
Synonym: |
IMA1992-005 |
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Seelite-2 Crystallography
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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)= 3.23 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 9.05(1), 1.92(0.8), 4.44(0.8), |
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Physical Properties of Seelite-2
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Color: |
Yellow. |
Density: |
3.7 |
Diaphaniety: |
Transparent to Translucent |
Hardness: |
3 - Calcite |
Luster: |
Vitreous (Glassy) |
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Optical Properties of Seelite-2
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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. |
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Calculated Properties of Seelite-2
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Electron Density: |
relectron=2.94 gm/cc note: rSeelite-2 =3.23 gm/cc. |
Fermion Index |
Fermion Index = 0.00773 Boson Index = 0.99227 |
Photoelectric: |
PESeelite-2 =1,092.55 barns/electron U=PESeelite-2 x relectron=3,211.18 barns/cc. |
Radioactivity: |
GRapi = 3,368,031.52 (Gamma Ray American Petroleum Institute Units)
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 / 8.39 cm |
77,727,707 |
2.10E-03 |
3,368,031.52 |
1,107.30 |
100 gm / 3.90 cm |
7,772,771 |
2.10E-04 |
336,803.15 |
110.73 |
10 gm / 1.81 cm |
777,277 |
2.10E-05 |
33,680.32 |
11.07 |
1 gm / 8.39 mm |
77,728 |
2.10E-06 |
3,368.03 |
1.11 |
0.1 gm / 3.90 mm |
7,773 |
2.10E-07 |
336.80 |
0.11 |
0.01 gm / 1.81 mm |
777 |
2.10E-08 |
33.68 |
0.01 |
0.001 gm / 0.84 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 3.23 gm/cc.*
Goverment Estimate of Average Annual Exposure (
360 mRem)
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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
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Seelite-2 Classification
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Dana Class: |
46.2.9.1 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites |
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(46.2)with miscellaneous formulae |
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(46.2.9)Dana Group |
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46.2.9.1 Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O)(x=0.7) C 2/m 2/m |
Strunz Class: |
VII/E.01-35* VII - Phosphates, Arsenates and Vanadates |
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VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6- |
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VII/E.01 - Autunite group |
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VII/E.01-10 Trogerite H2(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m |
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VII/E.01-20 Sabugalite HAl(UO2)4(PO4)4·16(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-30 Saleeite Mg(UO2)2(PO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-35 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2·7(H2O) C 2/m 2/m |
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VII/E.01-35* Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O)(x=0.7) C 2/m 2/m |
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VII/E.01-40 Novacekite Mg(UO2)2(AsO4)2·12(H2O) P 41/n 4/m |
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VII/E.01-50 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 41/n 4/m |
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VII/E.01-60 Fritzscheite Mn(UO2)2[(V,P)O4]2·4(H2O) Pnam 2/m 2/m 2/m |
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VII/E.01-70 Torbernite Cu(UO2)2(PO4)2·8-12(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-80 Zeunerite Cu(UO2)2(AsO4)2·10-16(H2O) P 4/nnc 4/m 2/m 2/m |
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VII/E.01-90 Autunite Ca(UO2)2(PO4)2·10-12(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-100 Uranospinite Ca(UO2)2(AsO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m |
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VII/E.01-110 Uranocircite Ba(UO2)2(PO4)2·12(H2O) P 4/nnc 4/m 2/m 2/m |
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VII/E.01-120 Heinrichite Ba(UO2)2(AsO4)2·10-12(H2O) IA/mmm 4/m 2/m 2/m |
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VII/E.01-130 Sodium-autunite Na2(UO2)2(PO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m |
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Other Seelite-2 Information
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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-2 :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 - 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: 46.2.9.1 Strunz No: VII/E.01-35*
Locality:
Notes:
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