Guilleminite Mineral Data

Guilleminite Mineral Data +

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General Guilleminite Information

Chemical Formula:

Ba(UO2)3(SeO3)2O2·3(H2O)

Composition:

Molecular Weight = 1,287.37 gm

Barium 10.67 % Ba 11.91 % BaO

Uranium 55.47 % U 62.93 % UO₂

Hydrogen 0.47 % H 4.20 % H₂O

Selenium 12.27 % Se 17.24 % SeO₂

Oxygen 21.13 % O

______ ______

100.00 % 96.27 % = TOTAL OXIDE

Empirical Formula:

Ba(UO₂)₃(SeO₃)₂O₂·3(H₂O)

IMA Status:

Approved IMA 1965

Locality:

Musonoi, Katanga (Shaba), Congo (Zaïre) Link to MinDat.org Location Data.

Name Origin:

Named for French Claude Guillemin (1923-1994), founder of the National Geological Service of the BRGM.

Synonym:

ICSD 81586

PDF 18-582

Guilleminite Image

Images:

Guilleminite

Comments: Radial, yellow aggregates of acicular crystals of guilleminite on green malachite.
Location: Musonoi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Guilleminite Crystallography

Axial Ratios:

a:b:c =0.4305:1:0.4204

Cell Dimensions:

a = 7.25, b = 16.84, c = 7.08, Z = 2; V = 864.40 Den(Calc)= 4.95

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P 2₁nm

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

By Intensity(I/I_o): 7.29(1), 8.39(1), 3.55(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Cooper M A , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.1103-1109, The crystal structure of guilleminite, a hydrated Ba-U-Se sheet structure

Physical Properties of Guilleminite

Cleavage:

[100] Perfect, [010] Good

Color:

Greenish yellow, Yellow.

Density:

4.88

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Optical Properties of Guilleminite

Gladstone-Dale:

CI meas= -0.259 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.241 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1564,KPDmeas= 0.1587,KC= 0.1261

Optical Data:

Biaxial (-), a=1.72, b=1.798, g=1.805, bire=0.0850, 2V(Calc)=32, 2V(Meas)=35.

Calculated Properties of Guilleminite

Electron Density:

r_electron=4.17 gm/cc
note: r_Guilleminite=4.95 gm/cc.

Fermion Index

Fermion Index = 0.03242
Boson Index = 0.96758

Photoelectric:

PE_Guilleminite=1,555.58 barns/electron
U=PE_Guilleminite x r_electron=6,483.68 barns/cc.

Radioactivity:

GRapi = 3,981,128.57 (Gamma Ray American Petroleum Institute Units)

Guilleminite 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) 7.64 ± 1.91 grams of pure Guilleminite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 764.02 ±191.01 grams of pure Guilleminite .

**Estimated Radioactivity from Guilleminite** - 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 / 7.28 cm	99,288,776	2.68E-03	3,981,128.57	1,308.86
100 gm / 3.38 cm	9,928,878	2.68E-04	398,112.86	130.89
10 gm / 1.57 cm	992,888	2.68E-05	39,811.29	13.09
1 gm / 7.28 mm	99,289	2.68E-06	3,981.13	1.31
0.1 gm / 3.38 mm	9,929	2.68E-07	398.11	0.13
0.01 gm / 1.57 mm	993	2.68E-08	39.81	0.01
0.001 gm / 0.73 mm	99	2.68E-09	3.98	0.00

Weight of pure Guilleminite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.95 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

Guilleminite Classification

Dana Class:

34.7.3.1 (34)Selenites - Tellurites - Sulfites

(34.7)Dana Type

(34.7.3)Dana Group

34.7.3.1 Guilleminite Ba(UO2)3(SeO3)2O2·3(H2O) P 2₁nm mm2

34.7.3.2 Piretite! Ca(UO2)3(SeO3)2(OH)4-4(H2O) P mn2₁,Pmnm Ortho

Strunz Class:

IV/K.11-30 IV - Oxides

IV/K - Uranyl-Selenides with [UO2]2+ - [SeO3]2- groups

IV/K.11 - Derriksite - Demesmaekerite series

IV/K.11-10 Derriksite Cu4(UO2)(SeO3)2(OH)6 Pn21m mm2

IV/K.11-20 Marthozite Cu[(UO2)3(SeO3)2O2]·8(H2O) Pbn21 mm2

IV/K.11-25 Haynesite (UO2)3(SeO3)2(OH)2·5(H2O) Pnc2,Pncm Ortho

IV/K.11-26 Larisaite! Na(H3O)(UO2)3(SeO3)2O2·4(H2O) Pm 2

IV/K.11-28 Piretite! Ca(UO2)3(SeO3)2(OH)4-4(H2O) P mn2₁,Pmnm Ortho

IV/K.11-30 Guilleminite Ba(UO2)3(SeO3)2O2·3(H2O) P 2₁nm mm2

IV/K.11-40 Demesmaekerite Pb2Cu5(UO2)2(SeO3)6(OH)6·2(H2O) P1 1

Other Guilleminite 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 Guilleminite :
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 - WWW-MINCRYST 14 -École des Mines de Paris

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Print or Cut-and-Paste your Guilleminite Specimen Label here :

Guilleminite

Ba(UO2)3(SeO3)2O2·3(H2O)
Dana No: 34.7.3.1 Strunz No: IV/K.11-30
Locality:

Notes: