Guilleminite Mineral Data

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.

Name Pronunciation:

Guilleminite + Pronunciation

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:

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drag2 - RMB Resize/Rotate
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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
Ncalc = 1.62

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:

Bulk Density (Electron Density)=4.17 gm/cc
note: Specific Gravity of Guilleminite =4.95 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

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

Radioactivity:

GRapi = 3,981,130.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Guilleminite per GRapi unit = 251.18 (PPB)

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 Becquerels (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	99,288,787	2.68E-03	3,981,130.59	1,308.86
100 gm / 3.38 cm	9,928,879	2.68E-04	398,113.06	130.89
10 gm / 1.57 cm	992,888	2.68E-05	39,811.31	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:

34.07.03.01 (34)Selenites - Tellurites - Sulfites

(34.07)Dana Type

(34.07.03)Dana Group

34.07.03.01 Guilleminite Ba(UO2)3(SeO3)2O2•3(H2O) P 2₁nm mm2

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

Strunz Class:

04.JJ.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JJ -Selenites with additional anions, with H2O

04.JJ.10 Guilleminite Ba(UO2)3(SeO3)2O2•3(H2O) P 2₁nm mm2

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 - 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
16 - WWW-MINCRYST

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

Guilleminite

Ba(UO2)3(SeO3)2O2•3(H2O)
Dana No: 34.07.03.01 Strunz No: 04.JJ.10
Locality:

Notes: