Vanuralite Mineral Data

General Vanuralite Information

Chemical Formula:

Al(UO2)2(VO4)2(OH)•11(H2O)

Composition:

Molecular Weight = 1,012.09 gm

Uranium 47.04 % U 53.36 % UO₂

Aluminum 2.67 % Al 5.04 % Al₂O₃

Vanadium 10.07 % V 17.97 % V₂O₅

Hydrogen 2.29 % H 20.47 % H₂O

Oxygen 37.94 % O

______ ______

100.00 % 96.84 % = TOTAL OXIDE

Empirical Formula:

Al(UO₂)₂(VO₄)₂(OH)•11(H₂O)

IMA Status:

Approved IMA 1963

Locality:

Mounana mine, Franceville, Haute Ogooue, Gabon. Link to MinDat.org Location Data.

Name Origin:

Named for the composition (Vanadium, Uranium).

Name Pronunciation:

Vanuralite + Pronunciation

Vanuralite Image

Images:

Metavanuralite Vanuralite

Comments: Bright yellow crystals of metavanuralite. Unless sealed in glass, all specimens of vanuralite change to metavanuralite.
Location: Mounana mine (Mouana), Franceville, Haut-Ogooue, Gabon. Scale: See Image.
© Paul M. Schumacher

Vanuralite Crystallography

Axial Ratios:

a:b:c =1.25:1:2.9052

Cell Dimensions:

a = 10.55, b = 8.44, c = 24.52, Z = 4; beta = 103° V = 2,127.35 Den(Calc)= 3.16

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a

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

By Intensity(I/I_o): 11.98(1), 5.98(0.9), 3.795(0.8),

Physical Properties of Vanuralite

Cleavage:

{001} Perfect

Color:

Lemon.

Density:

3.62

Diaphaneity:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Vanuralite

Gladstone-Dale:

CI meas= -0.136 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.302 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2532,KPDmeas= 0.221,KC= 0.1945
Ncalc = 1.61 - 1.7

Optical Data:

Biaxial (-), a=1.65, b=1.85, g=1.9, bire=0.2500, 2V(Calc)=48, 2V(Meas)=44.

Calculated Properties of Vanuralite

Electron Density:

Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Vanuralite =3.62 gm/cc.

Fermion Index:

Fermion Index = 0.0038238813
Boson Index = 0.9961761187

Photoelectric:

PE_Vanuralite=1,181.30 barns/electron
U=PE_Vanuralite x r_electron=3,870.32 barns/cc.

Radioactivity:

GRapi = 3,628,692.33 (Gamma Ray American Petroleum Institute Units)
Concentration of Vanuralite per GRapi unit = 275.58 (PPB)

Vanuralite 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) 8.38 ± 2.10 grams of pure Vanuralite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 838.23 ±209.56 grams of pure Vanuralite .

**Estimated Radioactivity from Vanuralite** - 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 / 8.08 cm	84,196,365	2.28E-03	3,628,692.33	1,192.99
100 gm / 3.75 cm	8,419,637	2.28E-04	362,869.23	119.30
10 gm / 1.74 cm	841,964	2.28E-05	36,286.92	11.93
1 gm / 8.08 mm	84,196	2.28E-06	3,628.69	1.19
0.1 gm / 3.75 mm	8,420	2.28E-07	362.87	0.12
0.01 gm / 1.74 mm	842	2.28E-08	36.29	0.01
0.001 gm / 0.81 mm	84	2.28E-09	3.63	0.00

Weight of pure Vanuralite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.62 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

Vanuralite Classification

Dana Class:

42.11.13.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq ï¿½ x(H2O)

(42.11.13)Vanuralite Group

42.11.13.01 Vanuralite Al(UO2)2(VO4)2(OH)•11(H2O) A2/a 2/m

42.11.13.02 Metavanuralite Al(UO2)2(VO4)2(OH)•8(H2O) P 1or P1 Tri

42.11.13.03 Threadgoldite Al(UO2)2(PO4)2(OH)•8(H2O) C 2/c 2/m

42.11.13.04 Chistyakovaite-(Y)! Al(UO2)2(AsO4)2(F,OH)•6.5H2O P 2/m, P 2 or Pm Mono

Strunz Class:

04.HB.20 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.20 Metavanuralite Al(UO2)2(VO4)2(OH)•8(H2O) P 1or P1 Tri

04.HB.20 Vanuralite Al(UO2)2(VO4)2(OH)•11(H2O) A2/a 2/m

Other Vanuralite Information

References:

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

See Also:

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

Vanuralite

Al(UO2)2(VO4)2(OH)•11(H2O)
Dana No: 42.11.13.01 Strunz No: 04.HB.20
Locality:

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