Strelkinite Mineral Data

Strelkinite Mineral Data +

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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.

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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:

OrthorhombicSpace 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

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:

r_electron=3.73 gm/cc
note: r_Strelkinite=4.22 gm/cc.

Fermion Index

Fermion Index = 0.00413
Boson Index = 0.99587

Photoelectric:

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

Radioactivity:

GRapi = 3,878,241.80 (Gamma Ray American Petroleum Institute Units)

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	92,222,823	2.49E-03	3,878,241.80	1,275.04
100 gm / 3.56 cm	9,222,282	2.49E-04	387,824.18	127.50
10 gm / 1.65 cm	922,228	2.49E-05	38,782.42	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:

40.2a.29.1 (40)Hydrated Phosphates, etc

(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.2a.29)Dana Group

40.2a.29.1 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho

Strunz Class:

VII/E.11-40 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-groupvanadates with [UO2]2+ - [V2O8]6-

VII/E.11 - Tyuyamunite series

VII/E.11-10 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m

VII/E.11-20 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri

VII/E.11-30 Sengierite Cu2(UO2)2V2O8·6(H2O) P 2₁/a 2/m

VII/E.11-40 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho

VII/E.11-50 Carnotite K2(UO2)2V2O8·3(H2O) P 2₁/a 2/m

VII/E.11-60 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 2₁/a 2/m

VII/E.11-70 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8·4(H2O)(?) C 2/c ? 2/m

VII/E.11-80 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m

VII/E.11-90 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m

VII/E.11-100 Francevillite (Ba,Pb)(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

VII/E.11-110 Curienite Pb(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Print or Cut-and-Paste your Strelkinite Specimen Label here :

Strelkinite

Na2(UO2)2V2O8·6(H2O)
Dana No: 40.2a.29.1 Strunz No: VII/E.11-40
Locality:

Notes: