Asselbornite Mineral Data

Asselbornite Mineral Data +

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General Asselbornite Information

Chemical Formula:

(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O)

Composition:

Molecular Weight = 3,228.32 gm

Barium 2.13 % Ba 2.37 % BaO

Uranium 44.24 % U 50.19 % UO₂

Bismuth 25.89 % Bi 28.87 % Bi₂O₃

Arsenic 4.64 % As 7.12 % As₂O₅

Hydrogen 0.56 % H 5.02 % H₂O

Lead 3.21 % Pb 3.46 % PbO

Oxygen 19.33 % O

______ ______

100.00 % 97.03 % = TOTAL OXIDE

Empirical Formula:

Pb_0.5Ba_0.5(UO₂)₆Bi₄O₄(AsO₄)₂(OH)₁₂·3(H₂O)

Environment:

In quartz gangue from a mine.

IMA Status:

Approved IMA 1983

Locality:

Walpurgis vein, Weisser Hirsch, Neustadtel, Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Eric Asselborn (1954-), mineral collector and surgeon, Montrevel-en-Bresse, France.

Asselbornite Image

Images:

Asselbornite

Comments: Small orange cubes of asselbornite on yellow uranophane.
Location: Wei?er Hirsch Mine, Schneeberg, Erzgebirge, Sachsen, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Asselbornite Crystallography

Cell Dimensions:

a = 15.66, Z = 4; V = 3,840.39 Den(Calc)= 5.58

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I m3m

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

By Intensity(I/I_o): 4.185(1), 3.196(0.8), 4.52(0.7),

Physical Properties of Asselbornite

Cleavage:

None

Color:

Brown, Lemon yellow.

Density:

5.6

Diaphaniety:

Translucent

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

3 - Calcite

Luster:

Adamantine - Greasy

Streak:

lemon

Optical Properties of Asselbornite

Gladstone-Dale:

CI meas= -0.231 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.235 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1613,KPDmeas= 0.1607,KC= 0.1306

Optical Data:

Isotropic, n=1.9.

Calculated Properties of Asselbornite

Electron Density:

r_electron=4.68 gm/cc
note: r_Asselbornite=5.60 gm/cc.

Fermion Index

Fermion Index = 0.01416
Boson Index = 0.98584

Photoelectric:

PE_Asselbornite=1,772.31 barns/electron
U=PE_Asselbornite x r_electron=8,294.56 barns/cc.

Radioactivity:

GRapi = 3,151,395.55 (Gamma Ray American Petroleum Institute Units)

Asselbornite 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) 9.65 ± 2.41 grams of pure Asselbornite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 965.18 ±241.30 grams of pure Asselbornite .

**Estimated Radioactivity from Asselbornite** - 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 / 6.99 cm	79,187,595	2.14E-03	3,151,395.55	1,036.08
100 gm / 3.24 cm	7,918,760	2.14E-04	315,139.56	103.61
10 gm / 1.51 cm	791,876	2.14E-05	31,513.96	10.36
1 gm / 6.99 mm	79,188	2.14E-06	3,151.40	1.04
0.1 gm / 3.24 mm	7,919	2.14E-07	315.14	0.10
0.01 gm / 1.51 mm	792	2.14E-08	31.51	0.01
0.001 gm / 0.70 mm	79	2.14E-09	3.15	0.00

Weight of pure Asselbornite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.60 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

Asselbornite Classification

Dana Class:

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

(42.4)where (AB)5 (XO4)2 Zq · x(H2O)

(42.4.11)Dana Group

42.4.11.1 Asselbornite (Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O) I m3m 4/m 3 2/m

42.4.11.2 IMA2004-022! Pb2(UO2)11(BiO)8(PO4)5(OH)19·6(H2O) I m3m, I 432, I m3 or I 23 Cubic

Strunz Class:

VII/E.10-10 VII - Phosphates, Arsenates and Vanadates

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

VII/E.10 - Asselbornite - Walpurgite series

VII/E.10-10 Asselbornite (Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O) I m3m 4/m 3 2/m

VII/E.10-12 Phosphowalpurgite! (UO2)Bi4(PO4)O4·2(H2O) P1 1

VII/E.10-15 Orthowalpurgite (UO2)Bi4O4(AsO4)2·2(H2O) Pbcm 2/m 2/m 2/m

VII/E.10-20 Walpurgite Bi4(UO2)(AsO4)2O4·2(H2O) P1 1

VII/E.10-50 Arapovite! (U,Th)(Ca,Na)2(K1-x[]x)Si8O20,x~0.5 P 4/mcc 4/m 2/m 2/m

Other Asselbornite 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 Asselbornite :
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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Asselbornite

(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12·3(H2O)
Dana No: 42.4.11.1 Strunz No: VII/E.10-10
Locality:

Notes: