Metavanmeersscheite Mineral Data

General Metavanmeersscheite Information

Chemical Formula:

U++++++(UO2)3(PO4)2(OH)6•2(H2O)

Composition:

Molecular Weight = 1,376.13 gm

Uranium 69.19 % U 58.87 % UO₂ / 20.78 % UO₃

Phosphorus 4.50 % P 10.31 % P₂O₅

Hydrogen 0.73 % H 6.55 % H₂O

Oxygen 25.58 % O

______ ______

100.00 % 96.51 % = TOTAL OXIDE

Empirical Formula:

U(UO₂)₃(PO₄)₂(OH)₆•2(H₂O)

Environment:

Rare secondary mineral in the uraniferous zone of an altered granite pegmatite, formed by dehydration of vanmeersscheite.

IMA Status:

Approved IMA 1982

Locality:

Kobokobo pegmatite, Lusungu River district, Kivu Province, Congo (Zaire). Link to MinDat.org Location Data.

Name Origin:

Named by adding the prefix meta which indicates the dehydration product of vanmeersscheite.

Name Pronunciation:

Metavanmeersscheite + Pronunciation

Metavanmeersscheite Image

Images:

Vanmeersscheite Metavanmeersscheite

Comments: Yellow coatings of vanmeersscheite on sandstone. Unless sealed in glass, all specimens should be considered to have become metavanmeersscheite.
Location: Cameron, Coconino Co., Arizona, USA. Scale: Sample Size 4 cm Glass Vial.
© Diederik Visser

Metavanmeersscheite Crystallography

Axial Ratios:

a:b:c =1.0088:1:0.4154

Cell Dimensions:

a = 34.18, b = 33.88, c = 14.074, Z = 32; V = 16,297.95 Den(Calc)= 4.49

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2

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

By Intensity(I/I_o): 8.49(1), 6.01(0.9), 3.073(0.7),

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Forms: ( 0 1 0) ( 1 0 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Metavanmeersscheite

Cleavage:

{010} Good, {100} Distinct

Color:

Canary yellow.

Density:

4.49

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Fluorescent, Short UV=green, Long UV=green.

Streak:

light yellow

Optical Properties of Metavanmeersscheite

Gladstone-Dale:

CI meas= -0.216 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.216 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1514,KPDmeas= 0.1514,KC= 0.1245
Ncalc = 1.56

Optical Data:

Biaxial (-), a=1.67, b=1.68, g=1.69, bire=0.0200, 2V(Calc)=88, 2V(Meas)=83.

Calculated Properties of Metavanmeersscheite

Electron Density:

Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Metavanmeersscheite =4.49 gm/cc.

Fermion Index:

Fermion Index = 0.0051054053
Boson Index = 0.9948945947

Photoelectric:

PE_{Metavanmeersscheite}=1,849.67 barns/electron
U=PE_{Metavanmeersscheite} x r_electron=7,048.95 barns/cc.

Radioactivity:

GRapi = 5,005,503.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Metavanmeersscheite per GRapi unit = 199.78 (PPB)

Metavanmeersscheite 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) 6.08 ± 1.52 grams of pure Metavanmeersscheite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 607.66 ±151.92 grams of pure Metavanmeersscheite .

**Estimated Radioactivity from Metavanmeersscheite** - 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 / 7.52 cm	123,846,422	3.35E-03	5,005,503.44	1,645.64
100 gm / 3.49 cm	12,384,642	3.35E-04	500,550.34	164.56
10 gm / 1.62 cm	1,238,464	3.35E-05	50,055.03	16.46
1 gm / 7.52 mm	123,846	3.35E-06	5,005.50	1.65
0.1 gm / 3.49 mm	12,385	3.35E-07	500.55	0.16
0.01 gm / 1.62 mm	1,238	3.35E-08	50.06	0.02
0.001 gm / 0.75 mm	124	3.35E-09	5.01	0.00

Weight of pure Metavanmeersscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.49 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

Metavanmeersscheite Classification

Dana Class:

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

(42.07)where (AB)5 (XO4)3 Zq ï¿½ x(H2O)

(42.07.14)Vanmeersscheite Group

42.07.14.01 Vanmeersscheite U(UO2)3(PO4)2(OH)6•4(H2O) P mn2₁ mm2

42.07.14.02 Metavanmeersscheite U(UO2)3(PO4)2(OH)6•2(H2O) F dd2 mm2

42.07.14.03 Arsenovanmeersscheite U(OH)4[(UO2)3(AsO4)2(OH)2]•4H2O P 2₁mn 2 2 2

Strunz Class:

08.EC.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EC -UO2:RO4 = 3:2

08.EC.20 Metavanmeersscheite U(UO2)3(PO4)2(OH)6•2(H2O) F dd2 mm2

08.EC.20 Vanmeersscheite U(UO2)3(PO4)2(OH)6•4(H2O) P mn2₁ mm2

08.EC.20 Arsenovanmeersscheite U(OH)4[(UO2)3(AsO4)2(OH)2]•4H2O P 2₁mn 2 2 2

Other Metavanmeersscheite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Metavanmeersscheite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Metavanmeersscheite

U++++++(UO2)3(PO4)2(OH)6•2(H2O)
Dana No: 42.07.14.02 Strunz No: 08.EC.20
Locality:

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