Mineralogy Database

Schoepite Mineral Data

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General Schoepite Information

Help on Chemical  Formula: Chemical Formula: (UO2)8O2(OH)12•12(H2O)
Help on Composition: Composition: Molecular Weight = 2,612.49 gm
   Uranium   72.89 %  U    82.69 % UO2
   Hydrogen   1.39 %  H    12.41 % H2O
   Oxygen    25.72 %  O
            ______        ______ 
            100.00 %       95.10 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (UO2)8O2(OH)12•12(H2O)
Help on Environment: Environment: Found as an alteration product of uraninite, alters spontanously to metaschoepite and paraschoepite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1923
Help on Locality: Locality: Kasolo, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alfred Schoep (1881-1966), Belgian mineralogist who studied uranium mineralogy.
Help on Name Pronunciation: Name Pronunciation: Schoepite + Pronunciation Say SCHOEPITE
Help on Synonym: Synonym: ICSD 82477
  PDF 13-407
 

Schoepite Image

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  Schoepite   Becquerelite

Comments: Bright yellow crystals of schoepite on transparent yellow becquerelite.
Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: .
© Lou Perloff / Photo Atlas of Minerals

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  Metatorbernite   Schoepite

Comments: Green, tabular crystals of metatorbernite and acicular, yellow schoepite on matrix.
Location: Musonoi mine, Kolwezi, Shaba, (Katanga), Congo (Zaïre). Scale: Picture size 2.5 mm.
© Paul M. Schumacher

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  Ianthinite   Schoepite

Comments: Purple to brown resinous ianthinite with yellow schoepite and orange becquerelite.
Location: Colorado Plateau area, Saguache County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Schoepite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8534:1:0.8773
Help on Cell Dimensions: Cell Dimensions: a = 14.33, b = 16.79, c = 14.73, Z = 4; V = 3,544.05 Den(Calc)= 4.90
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P 21ca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.28(1), 5.08(0.7), 3.44(0.25),
Help on Forms: Forms:

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Drag2 - Resize

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Help on Above

Forms: ( 2 1 1) ( 0 2 1) ( 0 1 0) ( 0 1 1) ( 1 0 2) ( 1 1 1) ( 0 3 1) ( 2 1 0) ( 1 0 0) ( 0 0 1)

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Physical Properties of Schoepite

Help on Cleavage: Cleavage: {001} Perfect, {010} Indistinct
Help on Color: Color: Yellow, Lemon yellow, Brownish yellow, Amber.
Help on Density: Density: 4.8
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=pale green, Long UV=pale green.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow
 

Optical Properties of Schoepite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.189 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.165 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1455,KPDmeas= 0.1485,KC= 0.1249
Ncalc = 1.6 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.69, b=1.714, g=1.735, bire=0.0450
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Schoepite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.16 gm/cc
note: Specific Gravity of Schoepite =4.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053735882
Boson Index = 0.9946264118
Help on Photoelectric: Photoelectric: PESchoepite =1,949.59 barns/electron
U=PESchoepite x relectron=8,103.18 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 5,270,032.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Schoepite per GRapi unit = 189.75 (PPB)

Schoepite 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) 5.77 ± 1.44 grams of pure Schoepite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 577.16 ±144.29 grams of pure Schoepite .

Estimated Radioactivity from Schoepite - 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 / 7.30 cm 130,472,134 3.53E-03 5,270,032.39 1,732.61
100 gm / 3.39 cm 13,047,213 3.53E-04 527,003.24 173.26
10 gm / 1.57 cm 1,304,721 3.53E-05 52,700.32 17.33
1 gm / 7.30 mm 130,472 3.53E-06 5,270.03 1.73
0.1 gm / 3.39 mm 13,047 3.53E-07 527.00 0.17
0.01 gm / 1.57 mm 1,305 3.53E-08 52.70 0.02
0.001 gm / 0.73 mm 130 3.53E-09 5.27 0.00

Weight of pure Schoepite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.90 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
 

Schoepite Classification

Help on  Dana Class: Dana Class: 05.02.01.03 (05)Oxides Containing Uranium and Thorium
  (05.02)with a cation charge of 6+ (AO3) and hydrated
  (05.02.01)Schoepite Group
 
05.02.01.01 Metaschoepite UO3•n(H2O)(n<2) Pbna 2/m 2/m 2/m
 
05.02.01.02 Paraschoepite UO3•2(H2O)(?) P bca 2/m 2/m 2/m
 
05.02.01.03 Schoepite (UO2)8O2(OH)12•12(H2O) P 21ca mm2
Help on  Strunz Class: Strunz Class: 04.GA.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GA -Without additional cations
 
04.GA.05 Metaschoepite UO3•n(H2O)(n<2) Pbna 2/m 2/m 2/m
 
04.GA.05 Paraschoepite UO3•2(H2O)(?) P bca 2/m 2/m 2/m
 
04.GA.05 Schoepite (UO2)8O2(OH)12•12(H2O) P 21ca mm2
 

Other Schoepite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Schoepite :
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 Schoepite Specimen Label here :

Schoepite

(UO2)8O2(OH)12•12(H2O)
Dana No: 05.02.01.03 Strunz No: 04.GA.05
Locality:

 

Notes:

 

 
   
 


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