Paraschoepite Mineral Data

Paraschoepite Mineral Data +

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General Paraschoepite Information

Chemical Formula:

UO3·2(H2O) (?)

Composition:

Molecular Weight = 322.06 gm

Uranium 73.91 % U 88.81 % UO₃

Hydrogen 1.25 % H 11.19 % H₂O

Oxygen 24.84 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

UO₃·2(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1947

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named as a polymorph of schoepite.

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Paraschoepite Crystallography

Axial Ratios:

a:b:c =0.8389:1:0.9043

Cell Dimensions:

a = 14.12, b = 16.83, c = 15.22, Z = 32; V = 3,616.87 Den(Calc)= 4.73

Crystal System:

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

Physical Properties of Paraschoepite

Cleavage:

[001] Perfect, [010] Distinct

Color:

Yellow.

Fracture:

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

Hardness:

2-3 - Gypsum-Calcite

Streak:

light yellow

Optical Properties of Paraschoepite

Gladstone-Dale:

CI calc= -0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1564,KC= 0.1428

Optical Data:

Biaxial (?), a=1.7, b=1.75, g=1.77, bire=0.0700, 2V(Calc)=62, 2V(Meas)=40.

Calculated Properties of Paraschoepite

Electron Density:

r_electron=3.99 gm/cc
note: r_{Paraschoepite}=4.73 gm/cc.

Fermion Index

Fermion Index = 0.00544
Boson Index = 0.99456

Photoelectric:

PE_{Paraschoepite}=1,985.43 barns/electron
U=PE_{Paraschoepite} x r_electron=7,931.41 barns/cc.

Radioactivity:

GRapi = 5,320,653.37 (Gamma Ray American Petroleum Institute Units)

Paraschoepite 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) 5.72 ± 1.43 grams of pure Paraschoepite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 571.67 ±142.92 grams of pure Paraschoepite .

**Estimated Radioactivity from Paraschoepite** - 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 / 7.39 cm	132,296,716	3.58E-03	5,320,653.37	1,749.26
100 gm / 3.43 cm	13,229,672	3.58E-04	532,065.34	174.93
10 gm / 1.59 cm	1,322,967	3.58E-05	53,206.53	17.49
1 gm / 7.39 mm	132,297	3.58E-06	5,320.65	1.75
0.1 gm / 3.43 mm	13,230	3.58E-07	532.07	0.17
0.01 gm / 1.59 mm	1,323	3.58E-08	53.21	0.02
0.001 gm / 0.74 mm	132	3.58E-09	5.32	0.00

Weight of pure Paraschoepite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.73 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

Paraschoepite Classification

Dana Class:

5.2.1.2 (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.01-60 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 Paraschoepite Information

References:

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

See Also:

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

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Paraschoepite

UO3·2(H2O) (?)
Dana No: 5.2.1.2 Strunz No: IV/H.01-60
Locality:

Notes: