Metaschoepite Mineral Data

Metaschoepite Mineral Data +

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.

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: P?hla-Tellerh?user Gallery, P?hla, 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

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:

r_electron=4.04 gm/cc
note: r_{Metaschoepite}=4.83 gm/cc.

Fermion Index

Fermion Index = 0.00558
Boson Index = 0.99442

Photoelectric:

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

Radioactivity:

GRapi = 5,424,218.54 (Gamma Ray American Petroleum Institute Units)

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	136,103,402	3.68E-03	5,424,218.54	1,783.30
100 gm / 3.41 cm	13,610,340	3.68E-04	542,421.85	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:

5.2.1.1 (5)Oxides Containing Uranium and Thorium

(5.2)with a cation charge of 6+ (AO3) and hydrated

(5.2.1)Dana Group

5.2.1.1 Metaschoepite UO3·n(H2O)(n<2) Pbna 2/m 2/m 2/m

5.2.1.2 Paraschoepite UO3·2(H2O)(?) P bca 2/m 2/m 2/m

5.2.1.3 Schoepite (UO2)8O2(OH)12·12(H2O) P 2₁ca mm2

Strunz Class:

IV/H.01-50 IV - Oxides

IV/H - Uranyl ([UO2]2+) hydroxides and hydrates

IV/H.01 - Ianthinite - Paraschoepite series

IV/H.01-10 Ianthinite (UO2)·5(UO3)·10(H2O) P 2₁cn mm2

IV/H.01-20 Studtite [(UO2)O2(H2O)2](H2O)2 C 2/m 2/m

IV/H.01-30 Metastudtite UO4·2(H2O) I mmm 2/m 2/m 2/m

IV/H.01-40 Schoepite (UO2)8O2(OH)12·12(H2O) P 2₁ca mm2

IV/H.01-50 Metaschoepite UO3·n(H2O)(n<2) Pbna 2/m 2/m 2/m

IV/H.01-60 Paraschoepite UO3·2(H2O)(?) P bca 2/m 2/m 2/m

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Metaschoepite

UO3·n(H2O)(n<2)
Dana No: 5.2.1.1 Strunz No: IV/H.01-50
Locality:

Notes: