Strelkinite	IMA-A 1973-063
Uranium	40.2a.29.1 (Dana Classification Number)
(No Images)	7/E.11-40 (Strunz ID)

Property	Data	Remarks
Named for:	M. F. Strelkin (1905-1965), mineralogist specializing in uranium ores, Russia
Alternate     Name(s):
Mineral Class:	Phosphates, Arsenates and Vanadates   Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-group vanadates with [UO2]2+ - [V2O8]6-     Tyuyamunite series
Chemical     Formula:	Na2(UO2)2V2O8 · 6H2O	Sodium analogue of Carnotite
Chemical     Composition:	Hydrogen: (H) 1.31% Oxygen: (O) 31.17% Sodium: (Na) 4.98% Uranium: (U) 51.52% Vanadium: (V) 11.03%	by weight
Molecular     Weight:	924.00	daltons (amu)
Specific     Radioactivity:	(All radiation is for a 1 gram, fully aged specimen) Specific Activity Dose Rate Becquerels Curies milliRems/hour microSieverts/hour 9.2223 × 1004 2.49 × 10-06 1.28 127.50 Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
Crystalography:	System: Orthorhombic Axial Ratios: a: 1.2727 b: 1 c: 3.9138 Cell Dimensions: a: 10.64 Å b: 8.36 Å c: 32.72 Å Z: 8 V: 2,910.46 Å3 DenCalc: 4.22 H-M Symbol:   Space Group: Pnmm, Pnm2 X-Ray Diffraction:   By Intensity ( I/Io ) (1): 7.68 Å (0.8): 3.95 Å (0.6): 4.08 Å
Habit:	Powdery Encrustations
Cleavage:	[001] Perfect [010]   [100]
Fracture:
Moh's     Hardness:	2.5
Density:	4 - 4.2	grams/cm3
Color:	Golden Brown, Canary Yellow
Streak:	Light Yellow
Luster:	Silky - Pearly
Diaphaneity:
Pleochroism:	(x): Colorless (y:) Yellow (z:) Pale yellow
Ultra Violet     Fluorescence:	Long Wave: Short Wave: Light Green
Magnetism:	Non-magnetic
Occurance:	Carbonaceous-siliceous shales
Associated     Minerals:	Calcite, Conichalcite, Quartz, Scorodite, Tyrolite Mineral   -   > 75% of sites Mineral   -   > 50% of sites Minerals   -   Uranium & Thorium mineral links	These are minerals known to be found with Strelkinite
Locations:	Very rare Strelkinite Locations
Notes:	Strongly radioactive a- and b-particles, g-rays. Crystals are probably metamic.