General Uranophane-beta Information
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Chemical Formula: |
Ca[(UO2)SiO3(OH)]2·(H2O) |
Composition: |
Molecular Weight = 784.33 gm |
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Calcium 5.11 % Ca 7.15 % CaO |
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Uranium 60.70 % U 68.86 % UO2 |
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Silicon 7.16 % Si 15.32 % SiO2 |
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Hydrogen 0.51 % H 4.59 % H2O |
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Oxygen 26.52 % O |
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______ ______ |
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100.00 % 95.92 % = TOTAL OXIDE |
Empirical Formula: |
Ca2(UO2)2(SiO3)2(OH)·(H2O) |
Environment: |
An oxidation product of uraninite found in oxidized ores and pegmatites. |
IMA Status: |
Valid Species (Pre-IMA) 1935 |
Locality: |
Joachinsthal (Jachymov) Czech Republic. Link to MinDat.org Location Data. |
Name Origin: |
Named as the polymorph of uranophane. |
Synonym: |
Beta-uranophane |
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Beta-uranotile |
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Uranotile-beta |
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Uranophane-beta Image |
Images:
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Uranophane-beta Crystallography
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Axial Ratios: |
a:b:c =0.9043:1:0.4294 |
Cell Dimensions: |
a = 13.966, b = 15.443, c = 6.632, Z = 4; beta = 91.38° V = 1,429.95 Den(Calc)= 3.64 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a |
X Ray Diffraction: |
By Intensity(I/Io): 7.83(1), 3.9(0.9), 3.51(0.6), |
Crystal Structure:
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Viswanathan K , Harneit O , American Mineralogist , 71 (1986) p.1489-1493, Refined crystal structure of beta-uranophane, Ca(UO2)2(SiO3OH)2.5H2O
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Physical Properties of Uranophane-beta
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Cleavage: |
[010] Perfect, [100] Poor |
Color: |
Green, Yellow. |
Density: |
3.9 |
Diaphaniety: |
Transparent to Translucent |
Habit: |
Acicular - Occurs as needle-like crystals. |
Habit: |
Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape. |
Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. |
Hardness: |
2.5-3 - Finger Nail-Calcite |
Luster: |
Vitreous - Silky |
Streak: |
pale yellow |
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Optical Properties of Uranophane-beta
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Gladstone-Dale: |
CI meas= -0.334 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.429 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1877,KPDmeas= 0.1752,KC= 0.1314 |
Optical Data: |
Biaxial (-), a=1.661-1.671, b=1.682-1.694, g=1.689-1.702, bire=0.0280-0.0310, 2V(Calc)=58-60, 2V(Meas)=0-71. Dispersion r > v strong. |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
deep yellow. |
Pleochroism (z): |
deep yellow. |
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Calculated Properties of Uranophane-beta
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Electron Density: |
relectron=3.38 gm/cc note: rUranophane-beta =3.90 gm/cc. |
Fermion Index |
Fermion Index = 0.00791 Boson Index = 0.99209 |
Photoelectric: |
PEUranophane-beta =1,589.36 barns/electron U=PEUranophane-beta x relectron=5,373.98 barns/cc. |
Radioactivity: |
GRapi = 4,485,425.45 (Gamma Ray American Petroleum Institute Units)
Uranophane-beta 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)
6.78 ± 1.70 grams of pure Uranophane-beta .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
678.12 ±169.53 grams of pure Uranophane-beta .
Estimated Radioactivity from Uranophane-beta - 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 / 7.88 cm |
108,645,930 |
2.94E-03 |
4,485,425.45 |
1,474.66 |
| 100 gm / 3.66 cm |
10,864,593 |
2.94E-04 |
448,542.54 |
147.47 |
| 10 gm / 1.70 cm |
1,086,459 |
2.94E-05 |
44,854.25 |
14.75 |
| 1 gm / 7.88 mm |
108,646 |
2.94E-06 |
4,485.43 |
1.47 |
| 0.1 gm / 3.66 mm |
10,865 |
2.94E-07 |
448.54 |
0.15 |
| 0.01 gm / 1.70 mm |
1,086 |
2.94E-08 |
44.85 |
0.01 |
| 0.001 gm / 0.79 mm |
109 |
2.94E-09 |
4.49 |
0.00 |
Weight of pure Uranophane-beta in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.90 gm/cc.*
Goverment Estimate of Average Annual Exposure (
360 mRem)
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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
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Uranophane-beta Classification
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Dana Class: |
53.3.1.9 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations |
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(53.3)with (UO2) |
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(53.3.1)Uranophane group |
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53.3.1.1 Kasolite Pb(UO2)SiO4·(H2O) P 21/a 2/m |
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53.3.1.2 Uranophane Ca(UO2)2SiO3(OH)2·5(H2O) P 21 2 |
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53.3.1.3 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2·4(H2O) C 2/m 2/m |
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53.3.1.4 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2·6(H2O) P1 1 |
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53.3.1.5 Boltwoodite HK(UO2)(SiO4)·1.5(H2O) P 21 2 |
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53.3.1.6 Sodium-boltwoodite (H3O)(Na,K)(UO2)SiO4·(H2O) P 212121 2 2 2 |
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53.3.1.7 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O) Aba2,Abam Ortho |
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53.3.1.8 Swamboite UH6(UO2)6(SiO4)6·30(H2O) P 21/a 2/m |
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53.3.1.9 Uranophane-beta Ca[(UO2)SiO3(OH)]2·(H2O) P 21/a 2/m |
Strunz Class: |
VIII/B.34-50 VIII - Silicates |
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VIII/B - Nesosub-silicates. "Insel" silicates with anions unfamiliar to tetraheders. Uranyl-"Insel" silicates with [UO2]2+ - [SiO4]4- |
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VIII/B.34 - Sklodowskite - Uranophane - Kasolite series |
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VIII/B.34-10 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2·4(H2O) C 2/m 2/m |
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VIII/B.34-20 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2·6(H2O) P1 1 |
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VIII/B.34-30 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O) Aba2,Abam Ortho |
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VIII/B.34-40 Uranophane Ca(UO2)2SiO3(OH)2·5(H2O) P 21 2 |
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VIII/B.34-50 Uranophane-beta Ca[(UO2)SiO3(OH)]2·(H2O) P 21/a 2/m |
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VIII/B.34-60 Boltwoodite HK(UO2)(SiO4)·1.5(H2O) P 21 2 |
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VIII/B.34-70 Sodium-boltwoodite (H3O)(Na,K)(UO2)SiO4·(H2O) P 212121 2 2 2 |
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VIII/B.34-80 Kasolite Pb(UO2)SiO4·(H2O) P 21/a 2/m |
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Other Uranophane-beta Information
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References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Uranophane-beta :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -MinDAT
7 -MinMax(Deutsch)
8 -MinMax(English)
9 -Mineralienatlas (Deutsch)
10 -QUT Mineral Atlas
11 - Uranium Minerals
12 -École des Mines de Paris
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Uranophane-beta
Ca[(UO2)SiO3(OH)]2·(H2O)
Dana No: 53.3.1.9 Strunz No: VIII/B.34-50
Locality:
Notes:
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