Metavanuralite Mineral Data

Metavanuralite Mineral Data +

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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.

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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:

TriclinicSpace 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

Diaphaniety:

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:

r_electron=3.26 gm/cc
note: r_{Metavanuralite}=3.65 gm/cc.

Fermion Index

Fermion Index = 0.00401
Boson Index = 0.99599

Photoelectric:

PE_{Metavanuralite}=1,264.08 barns/electron
U=PE_{Metavanuralite} x r_electron=4,122.45 barns/cc.

Radioactivity:

GRapi = 3,784,386.49 (Gamma Ray American Petroleum Institute Units)

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 / 8.06 cm	88,946,102	2.40E-03	3,784,386.49	1,244.18
100 gm / 3.74 cm	8,894,610	2.40E-04	378,438.65	124.42
10 gm / 1.74 cm	889,461	2.40E-05	37,843.86	12.44
1 gm / 8.06 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 / 1.74 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 3.65 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:

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

(42.11)where (AB)4 (XO4)3 Zq · x(H2O)

(42.11.13)Dana Group

42.11.13.1 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m

42.11.13.2 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri

42.11.13.3 Threadgoldite Al(UO2)2(PO4)2(OH)·8(H2O) C 2/c 2/m

Strunz Class:

VII/E.11-20 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 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 -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 -École des Mines de Paris

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Metavanuralite

Al(UO2)2(VO4)2(OH)·8(H2O)
Dana No: 42.11.13.2 Strunz No: VII/E.11-20
Locality:

Notes: