Sedovite Mineral Data

General Sedovite Information

Chemical Formula:

U(MoO4)2

Composition:

Molecular Weight = 557.90 gm

Uranium 42.66 % U 51.27 % UO₃

Molybdenum 34.39 % Mo 51.60 % MoO₃

Oxygen 22.94 % O

______ ______

100.00 % 102.87 % = TOTAL OXIDE

Empirical Formula:

U(MoO₄)₂

Environment:

Supergene zone of a U-Mo deposit.

IMA Status:

Approved IMA 1965

Locality:

Russia ? Link to MinDat.org Location Data.

Name Origin:

Named for Georgii Yakolevich Sedov (1877-1914), Russian polar investigator.

Name Pronunciation:

Sedovite

Sedovite Crystallography

Axial Ratios:

a:b:c =0.3032:1:0.5794

Cell Dimensions:

a = 3.36, b = 11.08, c = 6.42, Z = 1; V = 239.01 Den(Calc)= 3.88

Crystal System:

Orthorhombic Space Group: Unk

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

By Intensity(I/I_o): 3.193(1), 3.37(0.9), 11.04(0.9),

Physical Properties of Sedovite

Cleavage:

{???} Good

Color:

Brown, Reddish brown.

Density:

4.2

Diaphaneity:

Subopaque

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

3 - Calcite

Luster:

Sub Metallic

Streak:

red brown

Optical Properties of Sedovite

Gladstone-Dale:

CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.114 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2036,KPDmeas= 0.1881,KC= 0.1828
Ncalc = 1.71 - 1.77

Optical Data:

Biaxial (?), b=1.79

Calculated Properties of Sedovite

Electron Density:

Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Sedovite =4.20 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Sedovite=1,186.17 barns/electron
U=PE_Sedovite x r_electron=4,286.26 barns/cc.

Radioactivity:

GRapi = 3,128,855.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Sedovite per GRapi unit = 319.61 (PPB)

Sedovite 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) 9.72 ± 2.43 grams of pure Sedovite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 972.13 ±243.03 grams of pure Sedovite .

**Estimated Radioactivity from Sedovite** - 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 / 7.69 cm	76,370,066	2.06E-03	3,128,855.85	1,028.66
100 gm / 3.57 cm	7,637,007	2.06E-04	312,885.59	102.87
10 gm / 1.66 cm	763,701	2.06E-05	31,288.56	10.29
1 gm / 7.69 mm	76,370	2.06E-06	3,128.86	1.03
0.1 gm / 3.57 mm	7,637	2.06E-07	312.89	0.10
0.01 gm / 1.66 mm	764	2.06E-08	31.29	0.01
0.001 gm / 0.77 mm	76	2.06E-09	3.13	0.00

Weight of pure Sedovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.20 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

Sedovite Classification

Dana Class:

48.04.01.01 (48)Anhydrous Molybdates and Tungstates

(48.04)with miscellaneous formulae

(48.04.01)Dana Group

48.04.01.01 Sedovite U(MoO4)2 Unk Ortho

Strunz Class:

07.HA.05 07 - SULFATES (SELENATES, TELLURATES)

07.H - Uranium and Uranyl Molybdates and Wolframates

07.HA -With U4+

07.HA.05 Sedovite U(MoO4)2 Unk Ortho

Other Sedovite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Sedovite :
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 Sedovite Specimen Label here :

Sedovite

U(MoO4)2
Dana No: 48.04.01.01 Strunz No: 07.HA.05
Locality:

Notes:

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