Metaschoepite Mineral Data

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General Metaschoepite Information

Chemical Formula:

UO3•n(H2O)(n<2)

Composition:

Molecular Weight = 313.05 gm

Uranium 76.04 % U 91.37 % UO₃

Hydrogen 0.97 % H 8.63 % H₂O

Oxygen 23.00 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

UO₃•1.5(H₂O)

IMA Status:

Approved IMA 1960

Locality:

Kasolo (Shinkolobwe), Katanga (Shaba), Congo (Zaïre) Link to MinDat.org Location Data.

Name Origin:

Named as the lower hydrate of schoepite.

Name Pronunciation:

Metaschoepite

Synonym:

ICSD 280386

PDF 43-364

Metaschoepite Image

Images:

Click Here for Larger Metaschoepite Image

Metaschoepite Antlerite

Comments: Yellow crystals of metaschoepite with green antlerite.
Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Metaschoepite Crystallography

Axial Ratios:

a:b:c =0.8367:1:0.8809

Cell Dimensions:

a = 13.99, b = 16.72, c = 14.73, Z = 32; V = 3,445.54 Den(Calc)= 4.83

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbna

Crystal Structure:

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Weller M T , Light M E , Gelbrich T , Acta Crystallographica, Section B , 56 (2000) p.577-583

Physical Properties of Metaschoepite

Cleavage:

{001} Perfect, {010} Distinct

Color:

Yellow, Golden yellow.

Density:

4.69

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

2.5 - Finger Nail

Streak:

light yellow

Optical Properties of Metaschoepite

Optical Data:

NCalc= 1.66 - from Gladstone-Dale relationship (KC = 0.1372) where Ncalc=Dcalc*KC+1
NCalc= 1.64 - from Gladstone-Dale relationship (KC = 0.1372) where Ncalc=Dmeas*KC+1

Calculated Properties of Metaschoepite

Electron Density:

Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Metaschoepite =4.83 gm/cc.

Fermion Index:

Fermion Index = 0.0055863927
Boson Index = 0.9944136073

Photoelectric:

PE_{Metaschoepite}=2,061.19 barns/electron
U=PE_{Metaschoepite} x r_electron=8,332.08 barns/cc.

Radioactivity:

GRapi = 5,424,219.36 (Gamma Ray American Petroleum Institute Units)
Concentration of Metaschoepite per GRapi unit = 184.36 (PPB)

Metaschoepite 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) 5.61 ± 1.40 grams of pure Metaschoepite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 560.76 ±140.19 grams of pure Metaschoepite .

**Estimated Radioactivity from Metaschoepite** - 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 / 7.34 cm	136,103,403	3.68E-03	5,424,219.36	1,783.30
100 gm / 3.41 cm	13,610,340	3.68E-04	542,421.94	178.33
10 gm / 1.58 cm	1,361,034	3.68E-05	54,242.19	17.83
1 gm / 7.34 mm	136,103	3.68E-06	5,424.22	1.78
0.1 gm / 3.41 mm	13,610	3.68E-07	542.42	0.18
0.01 gm / 1.58 mm	1,361	3.68E-08	54.24	0.02
0.001 gm / 0.73 mm	136	3.68E-09	5.42	0.00

Weight of pure Metaschoepite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.83 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

Metaschoepite Classification

Dana Class:

05.02.01.01 (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

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 Metaschoepite Information

References:

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

See Also:

Links to other databases for Metaschoepite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Metaschoepite

UO3•n(H2O)(n<2)
Dana No: 05.02.01.01 Strunz No: 04.GA.05
Locality:

Notes: