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 % Al2 O3
Vanadium 10.07 % V 17.97 % V2 O5
Hydrogen 2.29 % H 20.47 % H2 O
Oxygen 37.94 % O
______ ______
100.00 % 96.84 % = TOTAL OXIDE
Empirical Formula:
Al(UO2 )2 (VO4 )2 (OH)•11(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEVanuralite =1,181.30 barns/electronU=PEVanuralite 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 � 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 1 or 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 1 or 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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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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