Swamboite Mineral Data

Swamboite Mineral Data +

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General Swamboite Information

Chemical Formula:

U++++++H6(UO2)6(SiO4)6·30(H2O)

Composition:

Molecular Weight = 2,957.20 gm

Uranium 56.34 % U 54.79 % UO₂ / 9.67 % UO₃

Silicon 5.70 % Si 12.19 % SiO₂

Hydrogen 2.25 % H 20.10 % H₂O

Oxygen 35.71 % O

______ ______

100.00 % 96.75 % = TOTAL OXIDE

Empirical Formula:

UH₆(UO₂)₆(SiO₄)₆·30(H₂O)

Environment:

Alteration product of other uranium minerals.

IMA Status:

Approved IMA 1981

Locality:

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

Name Origin:

Named for the locality.

Swamboite Image

Images:

Swamboite

Comments: Yellow crystals of Swamboite to 0.5 mm across.
Location: Swambo, Katanga, Dem. Rep. of the Congo. Scale: Picture size 1.5 cm.
© John Veevaert

Swamboite Crystallography

Axial Ratios:

a:b:c =0.84:1:0.958

Cell Dimensions:

a = 17.64, b = 21, c = 20.12, Z = 6; beta = 103.4° V = 7,250.34 Den(Calc)= 4.06

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 8.67(1), 4.32(0.8), 4.76(0.8),

Physical Properties of Swamboite

Cleavage:

[201] Good

Color:

Light yellow.

Density:

Diaphaniety:

Transparent to Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Swamboite

Optical Data:

Biaxial (-), a=1.64, b=1.661, g=1.663, bire=0.0230, 2V(Calc)=32, 2V(Meas)=30.

Pleochroism (x):

colorless.

Pleochroism (y):

pale yellow.

Pleochroism (z):

pale yellow.

Calculated Properties of Swamboite

Electron Density:

r_electron=3.63 gm/cc
note: r_Swamboite=4.06 gm/cc.

Fermion Index

Fermion Index = 0.00689
Boson Index = 0.99311

Photoelectric:

PE_Swamboite=1,430.04 barns/electron
U=PE_Swamboite x r_electron=5,191.06 barns/cc.

Radioactivity:

GRapi = 4,293,994.49 (Gamma Ray American Petroleum Institute Units)

Swamboite 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) 7.08 ± 1.77 grams of pure Swamboite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 708.35 ±177.09 grams of pure Swamboite .

**Estimated Radioactivity from Swamboite** - 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 / 7.78 cm	100,855,617	2.73E-03	4,293,994.49	1,411.72
100 gm / 3.61 cm	10,085,562	2.73E-04	429,399.45	141.17
10 gm / 1.68 cm	1,008,556	2.73E-05	42,939.94	14.12
1 gm / 7.78 mm	100,856	2.73E-06	4,293.99	1.41
0.1 gm / 3.61 mm	10,086	2.73E-07	429.40	0.14
0.01 gm / 1.68 mm	1,009	2.73E-08	42.94	0.01
0.001 gm / 0.78 mm	101	2.73E-09	4.29	0.00

Weight of pure Swamboite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.06 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

Swamboite Classification

Dana Class:

53.3.1.8 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations

(53.3)with (UO2)

(53.3.1)Uranophane group

53.3.1.1 Kasolite Pb(UO2)SiO4·(H2O) P 2₁/a 2/m

53.3.1.2 Uranophane Ca(UO2)2SiO3(OH)2·5(H2O) P 2₁ 2

53.3.1.3 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2·4(H2O) C 2/m 2/m

53.3.1.4 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2·6(H2O) P1 1

53.3.1.5 Boltwoodite HK(UO2)(SiO4)·1.5(H2O) P 2₁ 2

53.3.1.6 Sodium-boltwoodite (H3O)(Na,K)(UO2)SiO4·(H2O) P 2₁2₁2₁ 2 2 2

53.3.1.7 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O) Aba2,Abam Ortho

53.3.1.8 Swamboite UH6(UO2)6(SiO4)6·30(H2O) P 2₁/a 2/m

53.3.1.9 Uranophane-beta Ca[(UO2)SiO3(OH)]2·(H2O) P 2₁/a 2/m

Strunz Class:

VIII/B.36-20 VIII - Silicates

VIII/B - Nesosub-silicates. "Insel" silicates with anions unfamiliar to tetraheders. Uranyl-"Insel" silicates with [UO2]2+ - [SiO4]4-

VIII/B.36 - Soddyite - Swamboite series

VIII/B.36-10 Soddyite (UO2)2SiO4·2(H2O) F ddd 2/m 2/m 2/m

VIII/B.36-20 Swamboite UH6(UO2)6(SiO4)6·30(H2O) P 2₁/a 2/m

VIII/B.36-163 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m

VIII/B.36-165 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m

Other Swamboite Information

References:

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

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Swamboite

U++++++H6(UO2)6(SiO4)6·30(H2O)
Dana No: 53.3.1.8 Strunz No: VIII/B.36-20
Locality:

Notes: