Metacalciouranoite Mineral Data

General Metacalciouranoite Information

Chemical Formula:

(Ca,Na,Ba)U2O7•2(H2O)

Composition:

Molecular Weight = 718.40 gm

Barium 3.82 % Ba 4.27 % BaO

Sodium 0.96 % Na 1.29 % Na₂O

Calcium 2.23 % Ca 3.12 % CaO

Uranium 69.58 % U 83.61 % UO₃

Hydrogen 0.48 % H 4.26 % H₂O

Lead 2.88 % Pb 3.11 % PbO

Oxygen 20.04 % O

______ ______

100.00 % 99.67 % = TOTAL OXIDE

Empirical Formula:

Ca_0.4Na_0.3Ba_0.2Pb_0.1O2.1(UO₃)•1.7(H₂O)

Environment:

Oxidation zone of U-Mo deposit. An inadequately described species.

IMA Status:

Approved IMA 1973

Locality:

U-Mo deposit in Russia. Link to MinDat.org Location Data.

Name Origin:

Named from meta 'change' and calciouranoite indicating it's lower hydrate content.

Name Pronunciation:

Metacalciouranoite + Pronunciation

Metacalciouranoite Image

Images:

Calciouranoite Metacalciouranoite

Comments: Cryptocrystalline looking, greasy yellow blotches, of amorphous calciouranoite (probably, in part, dehydrated to matacalciouranoite).
Location: Oktyabr'skoye Mo-U deposit, east Transbaikal region, Russia. Scale: See Image.
© Rruff Database

Metacalciouranoite Crystallography

Crystal System:

Orthorhombic Space Group: Ortho ?

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.09(1), 1.676(0.67), 1.283(0.67),3.43(0.6), 1.94(0.4), 1.99(0.4), 1.73(0.3), 1.92(0.3),

Physical Properties of Metacalciouranoite

Color:

Orange.

Density:

4.9

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Optical Properties of Metacalciouranoite

Gladstone-Dale:

CI meas= -0.415 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1864,KC= 0.1318
Ncalc = 1.65

Optical Data:

Biaxial (-), a=1.897, b=1.911, g=1.932, bire=0.0350, 2V(Calc)=80, 2V(Meas)=81.

Calculated Properties of Metacalciouranoite

Electron Density:

Bulk Density (Electron Density)=4.08 gm/cc
note: Specific Gravity of Metacalciouranoite =4.90 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Metacalciouranoite}=1,966.39 barns/electron
U=PE_{Metacalciouranoite} x r_electron=8,028.57 barns/cc.

Radioactivity:

GRapi = 4,941,876.04 (Gamma Ray American Petroleum Institute Units)
Concentration of Metacalciouranoite per GRapi unit = 202.35 (PPB)

Metacalciouranoite 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) 6.15 ± 1.54 grams of pure Metacalciouranoite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 615.49 ±153.87 grams of pure Metacalciouranoite .

**Estimated Radioactivity from Metacalciouranoite** - 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	124,548,420	3.37E-03	4,941,876.04	1,624.73
100 gm / 3.39 cm	12,454,842	3.37E-04	494,187.60	162.47
10 gm / 1.57 cm	1,245,484	3.37E-05	49,418.76	16.25
1 gm / 7.30 mm	124,548	3.37E-06	4,941.88	1.62
0.1 gm / 3.39 mm	12,455	3.37E-07	494.19	0.16
0.01 gm / 1.57 mm	1,245	3.37E-08	49.42	0.02
0.001 gm / 0.73 mm	125	3.37E-09	4.94	0.00

Weight of pure Metacalciouranoite 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

Metacalciouranoite Classification

Dana Class:

05.04.03.01 (05)Oxides Containing Uranium and Thorium

(05.04)with alkaline-earth elements (hydrated)

(05.04.03)Dana Group

05.04.03.01 Metacalciouranoite (Ca,Na,Ba)U2O7•2(H2O) Ortho ? Ortho

05.04.03.02 Wolsendorfite (Pb,Ba,Ca)U2O7•2(H2O) Unk Ortho

Strunz Class:

04.GB.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.G - Uranyl Hydroxides

04.GB -With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra

04.GB.20 Calciouranoite (Ca,Ba,Pb)U2O7•5(H2O) Unk Tri

04.GB.20 Bauranoite BaU2O7•4-5(H2O) Triclinic ? Tri

04.GB.20 Metacalciouranoite (Ca,Na,Ba)U2O7•2(H2O) Ortho ? Ortho

Other Metacalciouranoite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Metacalciouranoite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Metacalciouranoite

(Ca,Na,Ba)U2O7•2(H2O)
Dana No: 05.04.03.01 Strunz No: 04.GB.20
Locality:

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