Asselbornite Mineral Data
General Asselbornite Information
Chemical Formula:
(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12•3(H2O)
Composition:
Molecular Weight = 3,237.04 gm
Barium 1.48 % Ba 1.66 % BaO
Uranium 42.50 % U 48.22 % UO2
Bismuth 26.99 % Bi 30.08 % Bi2 O3
Arsenic 3.77 % As 5.79 % As2 O5
Phosphorus 0.44 % P 1.01 % P2 O5
Hydrogen 0.56 % H 5.01 % H2 O
Lead 4.93 % Pb 5.31 % PbO
Oxygen 19.33 % O
______ ______
100.00 % 97.07 % = TOTAL OXIDE
Empirical Formula:
Pb0.77 Ba0.35 (UO2 )5.78 BiO4.18 AsO4 1.63 (PO4 )0.46 (OH)12 �3(H2 O)
Environment:
On a museum specimen initially, and 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, Dijon, France, in whose collection the mineral was first found..
Name Pronunciation:
Asselbornite + Pronunciation
Asselbornite Image
Images:
Asselbornite
Comments: Small orange cubes of asselbornite on yellow uranophane.
Location: Weißer 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)= 5.60
Crystal System:
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I m3m
X Ray Diffraction:
By Intensity(I/Io ): 4.185(1), 3.196(0.8), 4.52(0.7),
Physical Properties of Asselbornite
Cleavage:
None
Color:
Brown, Lemon yellow.
Diaphaneity:
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 calc = -0.221 (Poor) - where the CI = (1-KPDcalc /KC ) KPDcalc = 0.1607,KC = 0.1317 Ncalc = 1.74
Optical Data:
Isotropic, n=1.9.
Calculated Properties of Asselbornite
Electron Density:
Bulk Density (Electron Density)=4.68 gm/cc note: Specific Gravity of Asselbornite =5.60 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEAsselbornite =1,773.68 barns/electronU=PEAsselbornite x r electron =8,302.71 barns/cc.
Radioactivity:
GRapi = 3,028,304.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Asselbornite per GRapi unit = 330.22 (PPB)
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)
10.04 ± 2.51 grams of pure Asselbornite .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
1004.4 ±251.10 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
76,078,522
2.06E-03
3,028,304.94
995.61
100 gm / 3.24 cm
7,607,852
2.06E-04
302,830.49
99.56
10 gm / 1.51 cm
760,785
2.06E-05
30,283.05
9.96
1 gm / 6.99 mm
76,079
2.06E-06
3,028.30
1.00
0.1 gm / 3.24 mm
7,608
2.06E-07
302.83
0.10
0.01 gm / 1.51 mm
761
2.06E-08
30.28
0.01
0.001 gm / 0.70 mm
76
2.06E-09
3.03
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:
42.04.11.01 (42) Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.04) where (AB)5 (XO4)2 Zq � x(H2O)
(42.04.11) Asselbornite Group
42.04.11.01 Asselbornite (Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12•3(H2O) I m3m 4/m 3 2/m
42.04.11.02 Sreinite ! Pb2(UO2)11(BiO)8(PO4)5(OH)19•6(H2O) I m3m, I 432, I m3 or I 23 Cubic
Strunz Class:
08.ED.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.E - Uranyl Phosphates and Arsenates
08.ED -Unclassified
08.ED.10 Asselbornite (Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12•3(H2O) I m3m 4/m 3 2/m
08.ED.10 Sreinite ! Pb2(UO2)11(BiO)8(PO4)5(OH)19•6(H2O) I m3m, I 432, I m3 or I 23 Cubic
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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals
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Asselbornite
(Pb,Ba)(UO2)6(BiO)4(AsO4)2(OH)12•3(H2O)
Dana No: 42.04.11.01 Strunz No: 08.ED.10
Locality:
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