Mineralogy Database

Cuprosklodowskite Mineral Data

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General Cuprosklodowskite Information

Help on Chemical  Formula: Chemical Formula: Cu[(UO2)(SiO2OH)]2•6(H2O)
Help on Composition: Composition: Molecular Weight = 861.84 gm
   Uranium   55.24 %  U    62.66 % UO2
   Copper     7.37 %  Cu    9.23 % CuO
   Silicon    6.52 %  Si   13.94 % SiO2
   Hydrogen   1.17 %  H    10.45 % H2O
   Oxygen    29.70 %  O
            ______        ______ 
            100.00 %       96.29 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu(UO2)2(SiO4)2(H3O)2•2(H2O)
Help on Environment: Environment: A secondary mineral formed by alteration of earlier uranium minerals, both in situ and after transport of solutions.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1933
Help on Locality: Locality: Kalongwe deposit, Western area, Shaba Cu belt, Shaba, Za�re. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: A name supplied by Buttgenbach while introducing Vaes' paper, in the mistaken belief that it was the copper analog of sklodowskite.
Help on Name Pronunciation: Name Pronunciation: Cuprosklodowskite + Pronunciation Say CUPROSKLODOWSKITE
Help on Synonym: Synonym: ICSD 4350
  PDF 19-413

Cuprosklodowskite Image

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Comments: Very-fine, acicular crystals of apple green cuprosklodowskite on matrix.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Not Given.
© John Veevaert

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Comments: Green, acicular cuprosklodowskite crystals.
Location: Mashamba West Mine, Kolwezi, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 3 mm.
© Paul M. Schumacher

Cuprosklodowskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7609:1:0.7181
Help on Cell Dimensions: Cell Dimensions: a = 7.052, b = 9.267, c = 6.655, Z = 1; alpha = 109.23°, beta = 89.84°, gamma = 110.01° V = 385.85 Den(Calc)= 3.71
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.16(1), 4.82(0.9), 6.06(0.7),

Physical Properties of Cuprosklodowskite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Grass green, Green yellow, Light green.
Help on Density: Density: 3.8
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: greenish yellow

Optical Properties of Cuprosklodowskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.219 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.238 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.177,KPDmeas= 0.1742,KC= 0.1429
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.654-1.655, b=1.664-1.667, g=1.664-1.667, bire=0.0100-0.0120, 2V(Calc)=0, 2V(Meas)=0-5.

Calculated Properties of Cuprosklodowskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Cuprosklodowskite =3.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0071650842
Boson Index = 0.9928349158
Help on Photoelectric: Photoelectric: PECuprosklodowskite =1,428.72 barns/electron
U=PECuprosklodowskite x relectron=4,774.97 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,140,994.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Cuprosklodowskite per GRapi unit = 241.49 (PPB)

Cuprosklodowskite 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) 7.35 ± 1.84 grams of pure Cuprosklodowskite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 734.53 ±183.63 grams of pure Cuprosklodowskite .

Estimated Radioactivity from Cuprosklodowskite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.95 cm 98,874,375 2.67E-03 4,140,994.92 1,361.42
100 gm / 3.69 cm 9,887,438 2.67E-04 414,099.49 136.14
10 gm / 1.71 cm 988,744 2.67E-05 41,409.95 13.61
1 gm / 7.95 mm 98,874 2.67E-06 4,140.99 1.36
0.1 gm / 3.69 mm 9,887 2.67E-07 414.10 0.14
0.01 gm / 1.71 mm 989 2.67E-08 41.41 0.01
0.001 gm / 0.80 mm 99 2.67E-09 4.14 0.00

Weight of pure Cuprosklodowskite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.80 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

Cuprosklodowskite Classification

Help on  Dana Class: Dana Class: (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.03)with (UO2)
  (53.03.01)Uranophane group Kasolite Pb(UO2)SiO4•(H2O) P 21/a 2/m Uranophane Ca(UO2)2SiO3(OH)2•5(H2O) P 21 2 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2•4(H2O) C 2/m 2/m Cuprosklodowskite Cu[(UO2)(SiO2OH)]2•6(H2O) P1 1 Boltwoodite HK(UO2)(SiO4)•1.5(H2O) P 21 2 Natroboltwoodite (H3O)(Na,K)(UO2)SiO4•(H2O) P 212121 2 2 2 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) Aba2,Abam Ortho Swamboite UH6(UO2)6(SiO4)6•30(H2O) P 21/a 2/m Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.AK.10 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AK -Uranyl neso- and polysilicates
09.AK.10 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2•6(H2O) P1 1
09.AK.10 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) Aba2,Abam Ortho
09.AK.10 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2•4(H2O) C 2/m 2/m

Other Cuprosklodowskite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cuprosklodowskite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals

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Dana No: Strunz No: 09.AK.10





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