Calciouranoite Mineral Data

General Calciouranoite Information

Chemical Formula:

(Ca,Ba,Pb)U2O7•5(H2O)

Composition:

Molecular Weight = 667.92 gm

Barium 2.06 % Ba 2.30 % BaO

Sodium 0.34 % Na 0.46 % Na₂O

Calcium 4.20 % Ca 5.88 % CaO

Uranium 60.58 % U 72.80 % UO₃

Hydrogen 1.45 % H 12.95 % H₂O

Lead 3.10 % Pb 3.34 % PbO

Oxygen 28.27 % O

______ ______

100.00 % 97.72 % = TOTAL OXIDE

Empirical Formula:

Ca_0.7Ba_0.1Pb_0.1Na_0.1U_1.7O₇•4.8(H₂O)

Environment:

In felsite stringers, deep in the oxidation zone of a U-Mo deposit, in water-saturated ore-bearing faults.

IMA Status:

Approved IMA 1974

Locality:

Streltsovskoe U-Mo deposit, eastern Transbaikal, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for CALCIum and URANium in the composition.

Name Pronunciation:

Calciouranoite

Calciouranoite 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

Calciouranoite Crystallography

Crystal System:

Triclinic Space Group: Unk

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

By Intensity(I/I_o): 3.05(1), 3.406(1), 4(1),

Physical Properties of Calciouranoite

Cleavage:

{hk0} Distinct, {hk0} Distinct

Color:

Brown, Orange, Orange brown, Red orange.

Density:

4.62

Diaphaneity:

Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4 - Fluorite

Luster:

Greasy (Oily)

Optical Properties of Calciouranoite

Gladstone-Dale:

CI meas= -0.184 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1782,KC= 0.1505
Ncalc = 1.7

Optical Data:

Biaxial (-), a=1.76, b=1.84, g=1.87, bire=0.1100

Pleochroism (x):

deep lemon yellow.

Pleochroism (y):

deep lemon yellow.

Pleochroism (z):

very pale yellow.

Calculated Properties of Calciouranoite

Electron Density:

Bulk Density (Electron Density)=4.00 gm/cc
note: Specific Gravity of Calciouranoite =4.62 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Calciouranoite}=1,651.81 barns/electron
U=PE_{Calciouranoite} x r_electron=6,610.77 barns/cc.

Radioactivity:

GRapi = 4,473,381.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Calciouranoite per GRapi unit = 223.54 (PPB)

Calciouranoite 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) 6.80 ± 1.70 grams of pure Calciouranoite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 679.95 ±169.99 grams of pure Calciouranoite .

**Estimated Radioactivity from Calciouranoite** - 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 / 7.45 cm	108,443,677	2.93E-03	4,473,381.76	1,470.70
100 gm / 3.46 cm	10,844,368	2.93E-04	447,338.18	147.07
10 gm / 1.60 cm	1,084,437	2.93E-05	44,733.82	14.71
1 gm / 7.45 mm	108,444	2.93E-06	4,473.38	1.47
0.1 gm / 3.46 mm	10,844	2.93E-07	447.34	0.15
0.01 gm / 1.60 mm	1,084	2.93E-08	44.73	0.01
0.001 gm / 0.74 mm	108	2.93E-09	4.47	0.00

Weight of pure Calciouranoite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.62 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

Calciouranoite Classification

Dana Class:

05.04.02.01 (05)Oxides Containing Uranium and Thorium

(05.04)with alkaline-earth elements (hydrated)

(05.04.02)Uranoite Series

05.04.02.01 Calciouranoite (Ca,Ba,Pb)U2O7•5(H2O) Unk Tri

05.04.02.02 Bauranoite BaU2O7•4-5(H2O) Triclinic ? Tri

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 Calciouranoite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Calciouranoite :
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

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Calciouranoite

(Ca,Ba,Pb)U2O7•5(H2O)
Dana No: 05.04.02.01 Strunz No: 04.GB.20
Locality:

Notes:

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