Vandendriesscheite Mineral Data

General Vandendriesscheite Information

Chemical Formula:

Pb(UO2)10O6(OH)11•11(H2O)

Composition:

Molecular Weight = 3,513.04 gm

Uranium 67.76 % U 76.86 % UO₂

Hydrogen 0.95 % H 8.46 % H₂O

Lead 9.44 % Pb 10.17 % PbO

Oxygen 21.86 % O

______ ______

100.00 % 95.49 % = TOTAL OXIDE

Empirical Formula:

•11(H₂O)Pb_1.6(UO₂)₁₀O₆(OH)₁₁

Environment:

Orange-red oxidic zone of alteration "gummite" zone of uraninite.

IMA Status:

Valid Species (Pre-IMA) 1947

Locality:

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

Name Origin:

Named for Adrien Vandendriessche (1914-1940), Belgian mineralogist and geologist.

Name Pronunciation:

Vandendriesscheite + Pronunciation

Synonym:

ICSD 77514

PDF 13-117

Vandendriesscheite Image

Images:

Vandendriesscheite

Comments: Sparse waxy yellow vandendriesscheite on rock.
Location: Uluguru Mountains, Morogoro, Tanzania. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vandendriesscheite Crystallography

Axial Ratios:

a:b:c =0.3411:1:0.3512

Cell Dimensions:

a = 14.1165, b = 41.378, c = 14.5347, Z = 8; V = 8,489.90 Den(Calc)= 5.50

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca

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

By Intensity(I/I_o): 3.61(1), 7.25(1), 3.17(0.75),

Physical Properties of Vandendriesscheite

Cleavage:

{001} Perfect

Color:

Brownish yellow, Yellow orange.

Density:

5.45

Diaphaneity:

Transparent to Translucent

Hardness:

3 - Calcite

Luster:

Adamantine

Optical Properties of Vandendriesscheite

Gladstone-Dale:

CI meas= -0.278 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.267 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1509,KPDmeas= 0.1523,KC= 0.1192
Ncalc = 1.65 - 1.66

Optical Data:

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

Calculated Properties of Vandendriesscheite

Electron Density:

Bulk Density (Electron Density)=4.60 gm/cc
note: Specific Gravity of Vandendriesscheite =5.50 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Vandendriesscheite}=2,012.41 barns/electron
U=PE_{Vandendriesscheite} x r_electron=9,251.49 barns/cc.

Radioactivity:

GRapi = 4,827,384.62 (Gamma Ray American Petroleum Institute Units)
Concentration of Vandendriesscheite per GRapi unit = 207.15 (PPB)

Vandendriesscheite 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) 6.30 ± 1.58 grams of pure Vandendriesscheite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 630.09 ±157.52 grams of pure Vandendriesscheite .

**Estimated Radioactivity from Vandendriesscheite** - 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 / 7.03 cm	121,282,838	3.28E-03	4,827,384.62	1,587.09
100 gm / 3.26 cm	12,128,284	3.28E-04	482,738.46	158.71
10 gm / 1.51 cm	1,212,828	3.28E-05	48,273.85	15.87
1 gm / 7.03 mm	121,283	3.28E-06	4,827.38	1.59
0.1 gm / 3.26 mm	12,128	3.28E-07	482.74	0.16
0.01 gm / 1.51 mm	1,213	3.28E-08	48.27	0.02
0.001 gm / 0.70 mm	121	3.28E-09	4.83	0.00

Weight of pure Vandendriesscheite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.50 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

Vandendriesscheite Classification

Dana Class:

05.08.01.01 (05)Oxides Containing Uranium and Thorium

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

(05.08.01)Dana Group

05.08.01.01 Vandendriesscheite Pb(UO2)10O6(OH)11•11(H2O) P bca 2/m 2/m 2/m

05.08.01.02 Metavandendriesscheite PbU7O22•n(H2O)(n<12) Pmma,Pm2a Ortho

Strunz Class:

04.GB.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.G - Uranyl Hydroxides

04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra

04.GB.40 Metavandendriesscheite PbU7O22•n(H2O)(n<12) Pmma,Pm2a Ortho

04.GB.40 Vandendriesscheite Pb(UO2)10O6(OH)11•11(H2O) P bca 2/m 2/m 2/m

Other Vandendriesscheite Information

References:

NAME( Dana8) PHYS. PROP.(MINCRYST) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Vandendriesscheite

Pb(UO2)10O6(OH)11•11(H2O)
Dana No: 05.08.01.01 Strunz No: 04.GB.40
Locality:

Notes:

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