Strelkinite Mineral Data

General Strelkinite Information

Chemical Formula:

Na2(UO2)2V2O8•6(H2O)

Composition:

Molecular Weight = 924.00 gm

Sodium 4.98 % Na 6.71 % Na₂O

Uranium 51.52 % U 58.45 % UO₂

Vanadium 11.03 % V 19.68 % V₂O₅

Hydrogen 1.31 % H 11.70 % H₂O

Oxygen 31.17 % O

______ ______

100.00 % 96.54 % = TOTAL OXIDE

Empirical Formula:

Na₂(UO₂)₂V⁵⁺₂O₈•6(H₂O)

Environment:

Carbonaceous-siliceous shales. Na analogue of carnotite.

IMA Status:

Approved IMA 1974

Locality:

Russia. Link to MinDat.org Location Data.

Name Origin:

Named for M. F. Strelkin (1905-1965), mineralogist interested in uranium ores, Russia.

Name Pronunciation:

Strelkinite + Pronunciation

Strelkinite Image

Images:

Strelkinite

Comments: Yellow massive strelkinite.
Location: Basaral occurrence, southwest Balkhash region, Kazakhstan. Scale: See Image.
© Rruff Database

Strelkinite Crystallography

Axial Ratios:

a:b:c =1.2727:1:3.9138

Cell Dimensions:

a = 10.64, b = 8.36, c = 32.72, Z = 8; V = 2,910.46 Den(Calc)= 4.22

Crystal System:

Orthorhombic Space Group: Pnmm,Pnm2

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

By Intensity(I/I_o): 7.68(1), 3.95(0.8), 4.08(0.6),

Physical Properties of Strelkinite

Cleavage:

{001} Perfect

Color:

Golden yellow, Canary yellow.

Density:

4 - 4.2, Average = 4.09

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent, Short UV=light green.

Luster:

Silky - Pearly

Streak:

light yellow

Optical Properties of Strelkinite

Gladstone-Dale:

CI meas= -0.143 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.11 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1975,KPDmeas= 0.2033,KC= 0.1779
Ncalc = 1.71 - 1.75

Optical Data:

Biaxial (-), a=1.674-1.77, b=1.855-1.907, g=1.88-1.915, bire=0.1450-0.2060

Pleochroism (x):

colorless.

Pleochroism (y):

yellow.

Pleochroism (z):

pale yellow.

Calculated Properties of Strelkinite

Electron Density:

Bulk Density (Electron Density)=3.73 gm/cc
note: Specific Gravity of Strelkinite =4.22 gm/cc.

Fermion Index:

Fermion Index = 0.0041367455
Boson Index = 0.9958632545

Photoelectric:

PE_Strelkinite=1,326.01 barns/electron
U=PE_Strelkinite x r_electron=4,941.70 barns/cc.

Radioactivity:

GRapi = 3,878,243.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Strelkinite per GRapi unit = 257.85 (PPB)

Strelkinite 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) 7.84 ± 1.96 grams of pure Strelkinite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 784.29 ±196.07 grams of pure Strelkinite .

**Estimated Radioactivity from Strelkinite** - 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 / 7.68 cm	92,222,838	2.49E-03	3,878,243.92	1,275.04
100 gm / 3.56 cm	9,222,284	2.49E-04	387,824.39	127.50
10 gm / 1.65 cm	922,228	2.49E-05	38,782.44	12.75
1 gm / 7.68 mm	92,223	2.49E-06	3,878.24	1.28
0.1 gm / 3.56 mm	9,222	2.49E-07	387.82	0.13
0.01 gm / 1.65 mm	922	2.49E-08	38.78	0.01
0.001 gm / 0.77 mm	92	2.49E-09	3.88	0.00

Weight of pure Strelkinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.22 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

Strelkinite Classification

Dana Class:

40.02a.29.01 (40)Hydrated Phosphates, etc

(40.02a)where A++ (B++)2 (XO4) ï¿½ x(H2O), containing (UO2)++

(40.02a.29)Dana Group

40.02a.29.01 Strelkinite Na2(UO2)2V2O8•6(H2O) Pnmm,Pnm2 Ortho

Strunz Class:

04.HB.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HB -Uranyl Sorovanadates

04.HB.30 Strelkinite Na2(UO2)2V2O8•6(H2O) Pnmm,Pnm2 Ortho

Other Strelkinite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Strelkinite :
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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Strelkinite

Na2(UO2)2V2O8•6(H2O)
Dana No: 40.02a.29.01 Strunz No: 04.HB.30
Locality:

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