Rauvite Mineral Data

Rauvite Mineral Data +

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General Rauvite Information

Chemical Formula:

Ca(UO2)2V+++++10O28·16(H2O)

Composition:

Molecular Weight = 1,825.78 gm

Calcium 2.20 % Ca 3.07 % CaO

Uranium 26.07 % U 29.58 % UO₂

Vanadium 27.90 % V 49.81 % V₂O₅

Hydrogen 1.77 % H 15.79 % H₂O

Oxygen 42.06 % O

______ ______

100.00 % 98.25 % = TOTAL OXIDE

Empirical Formula:

Ca(UO₂)₂V⁵⁺₁₀O₂₈·16(H₂O)

Environment:

Oxidized zones of U-V ores in Colorado Plateau-type deposits.

IMA Status:

Valid Species (Pre-IMA) 1922

Locality:

Flat Top Mesa, San Rafael District, Emery County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the composition, RAdium, Uranium, and Vanadium.

Rauvite Image

Images:

Rauvite

Comments: Irregular grains of dark-colored rauvite in matrix.
Location: Monument No. 2 Mine, Monument Valley, Apache County, Arizona, USA. Scale: Picture size 2.5 mm.
© Paul M. Schumacher

Images:

Rauvite

Comments: Brownish-yellow scaly rauvite on sandstone.
Location: Monument Valley, Apache County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rauvite Crystallography

Crystal System:

Amorphous- No Crystals

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

By Intensity(I/I_o): 10.7(1), 2.95(0.5), 3.49(0.4),

Physical Properties of Rauvite

Cleavage:

None

Color:

Bluish black, Brown red, Orange, Purple red.

Density:

2.92

Diaphaniety:

Semitransparent

Fracture:

Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.

Habit:

Compact - Occurs as a compact mass.

Habit:

Waxy - Looks like candle wax.

Luminescence:

Non-fluorescent.

Luster:

Adamantine - Waxy

Magnetism:

Nonmagnetic

Streak:

brown

Optical Properties of Rauvite

Gladstone-Dale:

CI meas= -0.21 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.3134,KC= 0.2591

Optical Data:

Biaxial (-), a=1.88, g=1.95, bire=0.0700

Calculated Properties of Rauvite

Electron Density:

r_electron=2.72 gm/cc
note: r_Rauvite=2.92 gm/cc.

Fermion Index

Fermion Index = 0.0028
Boson Index = 0.9972

Photoelectric:

PE_Rauvite= 641.18 barns/electron
U=PE_Rauvite x r_electron=1,743.27 barns/cc.

Radioactivity:

GRapi = 2,069,413.06 (Gamma Ray American Petroleum Institute Units)

Rauvite 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) 14.70 ± 3.67 grams of pure Rauvite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1469.8 ±367.46 grams of pure Rauvite .

**Estimated Radioactivity from Rauvite** - 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 / 8.68 cm	46,672,943	1.26E-03	2,069,413.06	680.35
100 gm / 4.03 cm	4,667,294	1.26E-04	206,941.31	68.04
10 gm / 1.87 cm	466,729	1.26E-05	20,694.13	6.80
1 gm / 8.68 mm	46,673	1.26E-06	2,069.41	0.68
0.1 gm / 4.03 mm	4,667	1.26E-07	206.94	0.07
0.01 gm / 1.87 mm	467	1.26E-08	20.69	0.01
0.001 gm / 0.87 mm	47	1.26E-09	2.07	0.00

Weight of pure Rauvite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.92 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

Rauvite Classification

Dana Class:

47.4.4.1 (47)Vanadium Oxysalts

(47.4)(Hydrated Containing V++++ and V+++++)

(47.4.4)Dana Group

47.4.4.1 Rauvite Ca(UO2)2V10O28·16(H2O) None

Strunz Class:

IV/G.05-10 IV - Oxides

IV/G - Vanadiumoxides (with V4+/5+), Appendix to vanadates: Unclassified vanadates

IV/G.05 - Unclassified vanadates, Namibite

IV/G.05-10 Rauvite Ca(UO2)2V10O28·16(H2O) None

IV/G.05-20 Uvanite U2V6O21·15(H2O) Unk Ortho

Other Rauvite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Dana) OPTIC PROP.(AntBidBlaNic4)

See Also:

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

Rauvite

Ca(UO2)2V+++++10O28·16(H2O)
Dana No: 47.4.4.1 Strunz No: IV/G.05-10
Locality:

Notes: