Metavanuralite Mineral Data

General Metavanuralite Information

Chemical Formula:

Al(UO2)2(VO4)2(OH)•8(H2O)

Composition:

Molecular Weight = 958.04 gm

Uranium 49.69 % U 56.37 % UO₂

Aluminum 2.82 % Al 5.32 % Al₂O₃

Vanadium 10.63 % V 18.98 % V₂O₅

Hydrogen 1.79 % H 15.98 % H₂O

Oxygen 35.07 % O

______ ______

100.00 % 96.66 % = TOTAL OXIDE

Empirical Formula:

Al(UO₂)₂(VO₄)₂(OH)•8(H₂O)

Environment:

Stable at 20 deg C and 28-47% relative humidity.

IMA Status:

Approved IMA 1970

Locality:

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

Name Origin:

Named as the lower hydrate of vanuralite.

Name Pronunciation:

Metavanuralite + Pronunciation

Metavanuralite 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

Metavanuralite Crystallography

Axial Ratios:

a:b:c =1.2393:1:1.2357

Cell Dimensions:

a = 10.46, b = 8.44, c = 10.43, Z = 2; alpha = 75.88°, beta = 102.83°, gamma = 90° V = 870.67 Den(Calc)= 3.65

Crystal System:

Triclinic Space Group: P 1or P1

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

By Intensity(I/I_o): 9.92(1), 3.155(0.9), 4.174(0.9),

Physical Properties of Metavanuralite

Cleavage:

{001} Perfect

Color:

Lemon.

Density:

3.6

Diaphaneity:

Translucent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2 - Gypsum

Streak:

light yellow

Optical Properties of Metavanuralite

Optical Data:

NCalc= 1.68 - from Gladstone-Dale relationship (KC = 0.1863) where Ncalc=Dcalc*KC+1
NCalc= 1.67 - from Gladstone-Dale relationship (KC = 0.1863) where Ncalc=Dmeas*KC+1

Calculated Properties of Metavanuralite

Electron Density:

Bulk Density (Electron Density)=3.27 gm/cc
note: Specific Gravity of Metavanuralite =3.66 gm/cc.

Fermion Index:

Fermion Index = 0.0040146016
Boson Index = 0.9959853984

Photoelectric:

PE_{Metavanuralite}=1,264.08 barns/electron
U=PE_{Metavanuralite} x r_electron=4,133.75 barns/cc.

Radioactivity:

GRapi = 3,784,387.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Metavanuralite per GRapi unit = 264.24 (PPB)

Metavanuralite 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) 8.04 ± 2.01 grams of pure Metavanuralite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 803.74 ±200.94 grams of pure Metavanuralite .

**Estimated Radioactivity from Metavanuralite** - 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 / 8.05 cm	88,946,105	2.40E-03	3,784,387.71	1,244.18
100 gm / 3.74 cm	8,894,611	2.40E-04	378,438.77	124.42
10 gm / 1.73 cm	889,461	2.40E-05	37,843.88	12.44
1 gm / 8.05 mm	88,946	2.40E-06	3,784.39	1.24
0.1 gm / 3.74 mm	8,895	2.40E-07	378.44	0.12
0.01 gm / 1.73 mm	889	2.40E-08	37.84	0.01
0.001 gm / 0.81 mm	89	2.40E-09	3.78	0.00

Weight of pure Metavanuralite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.66 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

Metavanuralite Classification

Dana Class:

42.11.13.02 (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 Metavanuralite Information

References:

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

See Also:

Links to other databases for Metavanuralite :
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

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Metavanuralite

Al(UO2)2(VO4)2(OH)•8(H2O)
Dana No: 42.11.13.02 Strunz No: 04.HB.20
Locality:

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