Metavandendriesscheite Mineral Data

Metavandendriesscheite Mineral Data +

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General Metavandendriesscheite Information

Chemical Formula:

PbU7O22·n(H2O)(n<12)

Composition:

Molecular Weight = 2,395.46 gm

Uranium 69.56 % U 83.58 % UO₃

Hydrogen 0.42 % H 3.76 % H₂O

Lead 8.65 % Pb 9.32 % PbO

Oxygen 21.37 % O

______ ______

100.00 % 96.66 % = TOTAL OXIDE

Empirical Formula:

PbU₇O₂₂10(OH)

Environment:

"Gummite zone" of the uranium deposit.

IMA Status:

Approved IMA 1960

Locality:

Shinkolobwe, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Adrien Vandendriessche (1914-1940), Belgain mineralogist and geologist. Meta is used for dehydrated vandendriesscheite.

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Metavandendriesscheite Crystallography

Axial Ratios:

a:b:c =0.3405:1:1.0488

Cell Dimensions:

a = 14.07, b = 41.31, c = 43.33, Z = 35; V = 25,184.77 Den(Calc)= 5.53

Crystal System:

OrthorhombicSpace Group: Pmma,Pm2a

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

By Intensity(I/I_o): 3.61(1), 7.25(1), 3.17(0.8),2.52(0.3), 3.53(0.3), 2.03(0.2), 4.53(0.1),

Physical Properties of Metavandendriesscheite

Cleavage:

[001] Perfect

Color:

Orange, Amber.

Density:

5.45

Diaphaniety:

Transparent to Translucent

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3 - Calcite

Luster:

Adamantine

Optical Properties of Metavandendriesscheite

Gladstone-Dale:

CI meas= -0.23 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.212 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1501,KPDmeas= 0.1523,KC= 0.1238

Optical Data:

Biaxial (-), a=1.78, b=1.85, g=1.86, bire=0.0800, 2V(Calc)=40, 2V(Meas)=60.

Pleochroism (x):

colorless.

Pleochroism (y):

golden yellow.

Pleochroism (z):

golden yellow.

Calculated Properties of Metavandendriesscheite

Electron Density:

r_electron=4.58 gm/cc
note: r_{Metavandendriesscheite}=5.53 gm/cc.

Fermion Index

Fermion Index = 0.02422
Boson Index = 0.97578

Photoelectric:

PE_{Metavandendriesscheite}=2,065.67 barns/electron
U=PE_{Metavandendriesscheite} x r_electron=9,461.04 barns/cc.

Radioactivity:

GRapi = 4,910,484.29 (Gamma Ray American Petroleum Institute Units)

Metavandendriesscheite 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 Metavandendriesscheite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 619.42 ±154.86 grams of pure Metavandendriesscheite .

**Estimated Radioactivity from Metavandendriesscheite** - 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 / 7.02 cm	124,506,314	3.37E-03	4,910,484.29	1,614.41
100 gm / 3.26 cm	12,450,631	3.37E-04	491,048.43	161.44
10 gm / 1.51 cm	1,245,063	3.37E-05	49,104.84	16.14
1 gm / 7.02 mm	124,506	3.37E-06	4,910.48	1.61
0.1 gm / 3.26 mm	12,451	3.37E-07	491.05	0.16
0.01 gm / 1.51 mm	1,245	3.37E-08	49.10	0.02
0.001 gm / 0.70 mm	125	3.37E-09	4.91	0.00

Weight of pure Metavandendriesscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.53 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

Metavandendriesscheite Classification

Dana Class:

5.8.1.2 (5)Oxides Containing Uranium and Thorium

(5.8)with a cation charge of 6+ containing Pb and sigificant water of hydration

(5.8.1)Dana Group

5.8.1.1 Vandendriesscheite Pb(UO2)10O6(OH)11·11(H2O) P bca 2/m 2/m 2/m

5.8.1.2 Metavandendriesscheite PbU7O22·n(H2O)(n<12) Pmma,Pm2a Ortho

Strunz Class:

IV/H.07-30 IV - Oxides

IV/H - Uranyl ([UO2]2+) hydroxides and hydrates

IV/H.07 - Fourmarierite - Masuyite series

IV/H.07-10 Fourmarierite Pb(UO2)4O3(OH)4·4(H2O) Bb21m mm2

IV/H.07-20 Vandendriesscheite Pb(UO2)10O6(OH)11·11(H2O) P bca 2/m 2/m 2/m

IV/H.07-30 Metavandendriesscheite PbU7O22·n(H2O)(n<12) Pmma,Pm2a Ortho

IV/H.07-40 Sayrite Pb2(UO2)5O6(OH)2·4(H2O) P 2₁/c 2/m

IV/H.07-45 Spriggite! Pb3[(UO2)6O8(OH)2](H2O)x;x~3 C 2/c 2/m

IV/H.07-50 Curite Pb3x(H2O)2[(UO2)4x(OH)3-x]2,x~0.5 Pnam 2/m 2/m 2/m

IV/H.07-60 Richetite PbU4O13·4(H2O) P1 or P1 Tri

IV/H.07-70 Masuyite Pb[(UO2)3O3(OH)2]·3(H2O) Pn m

Other Metavandendriesscheite 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 Metavandendriesscheite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Metavandendriesscheite

PbU7O22·n(H2O)(n<12)
Dana No: 5.8.1.2 Strunz No: IV/H.07-30
Locality:

Notes: