Vanmeersscheite Mineral Data

Vanmeersscheite Mineral Data +

General Vanmeersscheite Information

Chemical Formula:

U++++++(UO2)3(PO4)2(OH)6·4(H2O)

Composition:

Molecular Weight = 1,412.16 gm

Uranium 67.42 % U 57.36 % UO₂ / 20.25 % UO₃

Phosphorus 4.39 % P 10.05 % P₂O₅

Hydrogen 1.00 % H 8.93 % H₂O

Oxygen 27.19 % O

______ ______

100.00 % 96.60 % = TOTAL OXIDE

Empirical Formula:

U(UO₂)₃(PO₄)₂(OH)₆·4(H₂O)

IMA Status:

Approved IMA 1982

Locality:

Link to MinDat.org Location Data.

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Vanmeersscheite Crystallography

Axial Ratios:

a:b:c =1.0178:1:0.419

Cell Dimensions:

a = 17.06, b = 16.76, c = 7.023, Z = 4; V = 2,008.06 Den(Calc)= 4.67

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P mn2₁

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

By Intensity(I/I_o): 8.39(1), 5.96(0.8), 4.18(0.7),

Crystal Structure:

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Piret P , Deliens M , Bulletin de Mineralogie , 105 (1982) p.125-128, La vanmeerscheite U(UO2)3(PO4)2(OH)6*4(H2O) et la, meta-vanmeerscheite U(UO2)3(PO4)2(OH)6*2(H2O), nouveaux mineraux, Locality: Kobokobo pegmatite, Kivu, Zaire

Physical Properties of Vanmeersscheite

Cleavage:

[010] Good, [100] Indistinct

Color:

Canary yellow.

Density:

4.67

Hardness:

2-3 - Gypsum-Calcite

Streak:

light yellow

Optical Properties of Vanmeersscheite

Optical Data:

Biaxial (-), a=1.704, b=1.715, g=1.718, bire=0.0140, 2V(Calc)=54, 2V(Meas)=56.

Calculated Properties of Vanmeersscheite

Electron Density:

r_electron=3.99 gm/cc
note: r_{Vanmeersscheite}=4.67 gm/cc.

Fermion Index

Fermion Index = 0.00498
Boson Index = 0.99502

Photoelectric:

PE_{Vanmeersscheite}=1,788.44 barns/electron
U=PE_{Vanmeersscheite} x r_electron=7,144.52 barns/cc.

Radioactivity:

GRapi = 4,916,119.85 (Gamma Ray American Petroleum Institute Units)

Vanmeersscheite 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) 6.19 ± 1.55 grams of pure Vanmeersscheite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 618.71 ±154.68 grams of pure Vanmeersscheite .

**Estimated Radioactivity from Vanmeersscheite** - 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 / 7.42 cm	120,686,526	3.26E-03	4,916,119.85	1,616.26
100 gm / 3.45 cm	12,068,653	3.26E-04	491,611.99	161.63
10 gm / 1.60 cm	1,206,865	3.26E-05	49,161.20	16.16
1 gm / 7.42 mm	120,687	3.26E-06	4,916.12	1.62
0.1 gm / 3.45 mm	12,069	3.26E-07	491.61	0.16
0.01 gm / 1.60 mm	1,207	3.26E-08	49.16	0.02
0.001 gm / 0.74 mm	121	3.26E-09	4.92	0.00

Weight of pure Vanmeersscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.67 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

Vanmeersscheite Classification

Dana Class:

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

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.14)Dana Group

42.7.14.1 Vanmeersscheite U(UO2)3(PO4)2(OH)6·4(H2O) P mn2₁ mm2

42.7.14.2 Metavanmeersscheite U(UO2)3(PO4)2(OH)6·2(H2O) F dd2 mm2

Strunz Class:

VII/E.07-140 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.07 - Phosphuranylite series

VII/E.07-10 Phuralumite Al2(UO2)3(PO4)2(OH)6·10(H2O) P 2₁/a 2/m

VII/E.07-20 Mundite Al(UO2)3(PO4)2(OH)3·5(H2O) P 2₁cn,Pmcn Ortho

VII/E.07-25 Yingjiangite (K2,Ca)(UO2)7(PO4)4(OH)6·6(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-30 Phosphuranylite KCa(H3O)3(UO2)7(PO4)4O4·8(H2O) C mcm 2/m 2/m 2/m

VII/E.07-40 Phurcalite Ca2(UO2)3O2(PO4)2·7(H2O) P bca 2/m 2/m 2/m

VII/E.07-50 Arsenuranylite Ca(UO2)4(AsO4)2(OH)4·6(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-60 Bergenite Ca2Ba4[(UO3)2O2(PO4)2]3(H2O)16 P 2₁/c 2/m

VII/E.07-70 Francoisite-(Nd) (Nd,Y,Sm,Ce)(UO2)3(PO4)2O(OH)·6(H2O) P 2₁/c 2/m

VII/E.07-80 Dewindtite Pb3[H(UO2)3O2(PO4)2]2·12(H2O) Bmmb 2/m 2/m 2/m

VII/E.07-90 Dumontite Pb2(UO2)3O2(PO4)2·5(H2O) P 2₁/m 2/m

VII/E.07-100 Hugelite Pb2(UO2)3(AsO4)2(OH)4·3(H2O) P 2₁/m 2/m

VII/E.07-110 Kamitugaite PbAl(UO2)5(PO4)2(OH)9·9.5(H2O) P1,P 1 Tri

VII/E.07-120 Kivuite? (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8·7(H2O) Unk Ortho

VII/E.07-130 Althupite ThAl(UO2)7(PO4)4(OH)5·15(H2O) P1 1

VII/E.07-140 Vanmeersscheite U(UO2)3(PO4)2(OH)6·4(H2O) P mn2₁ mm2

VII/E.07-150 Metavanmeersscheite U(UO2)3(PO4)2(OH)6·2(H2O) F dd2 mm2

Other Vanmeersscheite Information

References:

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

See Also:

Links to other databases for Vanmeersscheite :
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 - Uranium Minerals 13 -École des Mines de Paris

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Vanmeersscheite

U++++++(UO2)3(PO4)2(OH)6·4(H2O)
Dana No: 42.7.14.1 Strunz No: VII/E.07-140
Locality:

Notes: