Calciouranoite Mineral Data

Calciouranoite Mineral Data +

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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:

For CALCIum and URANium in the composition.

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Calciouranoite Crystallography

Crystal System:

TriclinicSpace 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

Diaphaniety:

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

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:

r_electron=4.00 gm/cc
note: r_{Calciouranoite}=4.62 gm/cc.

Fermion Index

Fermion Index = 0.01507
Boson Index = 0.98493

Photoelectric:

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

Radioactivity:

GRapi = 4,473,379.25 (Gamma Ray American Petroleum Institute Units)

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	108,443,660	2.93E-03	4,473,379.25	1,470.70
100 gm / 3.46 cm	10,844,366	2.93E-04	447,337.92	147.07
10 gm / 1.60 cm	1,084,437	2.93E-05	44,733.79	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:

5.4.2.1 (5)Oxides Containing Uranium and Thorium

(5.4)with alkaline-earth elements (hydrated)

(5.4.2)Dana Group

5.4.2.1 Calciouranoite (Ca,Ba,Pb)U2O7·5(H2O) Unk Tri

5.4.2.2 Bauranoite BaU2O7·4-5(H2O) Triclinic ? Tri

Strunz Class:

IV/H.06-10 IV - Oxides

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

IV/H.06 - Calciouranoite - Wölsendorfite series

IV/H.06-10 Calciouranoite (Ca,Ba,Pb)U2O7·5(H2O) Unk Tri

IV/H.06-20 Metacalciouranoite (Ca,Na,Ba)U2O7·2(H2O) Ortho ? Ortho

IV/H.06-30 Bauranoite BaU2O7·4-5(H2O) Triclinic ? Tri

IV/H.06-40 Wolsendorfite (Pb,Ba,Ca)U2O7·2(H2O) Unk 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 -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 - Uranium Minerals 13 -École des Mines de Paris

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Calciouranoite

(Ca,Ba,Pb)U2O7·5(H2O)
Dana No: 5.4.2.1 Strunz No: IV/H.06-10
Locality:

Notes: