Sodium-boltwoodite Mineral Data

Sodium-boltwoodite Mineral Data

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General Sodium-boltwoodite Information

Chemical Formula:

(H3O)(Na,K)(UO2)SiO4·(H2O)

Composition:

Molecular Weight = 696.19 gm

Potassium 1.40 % K 1.69 % K₂O

Sodium 2.48 % Na 3.34 % Na₂O

Uranium 68.38 % U 77.57 % UO₂

Silicon 4.03 % Si 8.63 % SiO₂

Hydrogen 0.72 % H 6.47 % H₂O

Oxygen 22.98 % O

______ ______

100.00 % 97.70 % = TOTAL OXIDE

Empirical Formula:

(H₃O)Na_0.75K_0.25(UO₂)₂(SiO₄)·(H₂O)

IMA Status:

Approved IMA 1975

Locality:

Link to MinDat.org Location Data.

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Sodium-boltwoodite Crystallography

Axial Ratios:

a:b:c =3.9031:1:0.9472

Cell Dimensions:

a = 27.4, b = 7.02, c = 6.65, Z = 4; V = 1,279.11 Den(Calc)= 3.61

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 2.92(1), 6.71(1), 4.7(0.8),

Physical Properties of Sodium-boltwoodite

Color:

Yellow, White.

Density:

4.1

Hardness:

3.5-4 - Copper Penny-Fluorite

Optical Properties of Sodium-boltwoodite

Gladstone-Dale:

CI meas= -0.295 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.471 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.187,KPDmeas= 0.1647,KC= 0.1272

Optical Data:

Biaxial (-), a=1.692, g=1.6585, bire=0.0335

Calculated Properties of Sodium-boltwoodite

Electron Density:

r_electron=3.49 gm/cc
note: r_{Sodium-boltwoodite}=4.10 gm/cc.

Fermion Index

Fermion Index = 0.00692
Boson Index = 0.99308

Photoelectric:

PE_{Sodium-boltwoodite}=1,824.80 barns/electron
U=PE_{Sodium-boltwoodite} x r_electron=6,361.97 barns/cc.

Radioactivity:

GRapi = 4,956,281.90 (Gamma Ray American Petroleum Institute Units)

Sodium-boltwoodite 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) 6.14 ± 1.53 grams of pure Sodium-boltwoodite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 613.70 ±153.42 grams of pure Sodium-boltwoodite .

**Estimated Radioactivity from Sodium-boltwoodite** - 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 / 7.75 cm	122,400,715	3.31E-03	4,956,281.90	1,629.46
100 gm / 3.60 cm	12,240,072	3.31E-04	495,628.19	162.95
10 gm / 1.67 cm	1,224,007	3.31E-05	49,562.82	16.29
1 gm / 7.75 mm	122,401	3.31E-06	4,956.28	1.63
0.1 gm / 3.60 mm	12,240	3.31E-07	495.63	0.16
0.01 gm / 1.67 mm	1,224	3.31E-08	49.56	0.02
0.001 gm / 0.78 mm	122	3.31E-09	4.96	0.00

Weight of pure Sodium-boltwoodite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.10 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

Sodium-boltwoodite Classification

Dana Class:

53.3.1.6 (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.34-70 VIII - Silicates

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

VIII/B.34 - Sklodowskite - Uranophane - Kasolite series

VIII/B.34-10 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2·4(H2O) C 2/m 2/m

VIII/B.34-20 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2·6(H2O) P1 1

VIII/B.34-30 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O) Aba2,Abam Ortho

VIII/B.34-40 Uranophane Ca(UO2)2SiO3(OH)2·5(H2O) P 2₁ 2

VIII/B.34-50 Uranophane-beta Ca[(UO2)SiO3(OH)]2·(H2O) P 2₁/a 2/m

VIII/B.34-60 Boltwoodite HK(UO2)(SiO4)·1.5(H2O) P 2₁ 2

VIII/B.34-70 Sodium-boltwoodite (H3O)(Na,K)(UO2)SiO4·(H2O) P 2₁2₁2₁ 2 2 2

VIII/B.34-80 Kasolite Pb(UO2)SiO4·(H2O) P 2₁/a 2/m

Other Sodium-boltwoodite Information

References:

PHYS. PROP.(Larousse des Mineraux,1981) OPTIC PROP.(Larousse des Mineraux,1981)

See Also:

Links to other databases for Sodium-boltwoodite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Sodium-boltwoodite

(H3O)(Na,K)(UO2)SiO4·(H2O)
Dana No: 53.3.1.6 Strunz No: VIII/B.34-70
Locality:

Notes: