Joliotite Mineral Data

General Joliotite Information

Chemical Formula:

(UO2)(CO3)•n(H2O), (n=2?)

Composition:

Molecular Weight = 366.07 gm

Uranium 65.02 % U 73.76 % UO₂

Hydrogen 1.10 % H 9.84 % H₂O

Carbon 3.28 % C 12.02 % CO₂

Oxygen 30.59 % O

______ ______

100.00 % 95.63 % = TOTAL OXIDE

Empirical Formula:

(UO₂)(CO₃)•2(H₂O)

Environment:

Occurs as crusts on "limonite" and barite at uranium deposits.

IMA Status:

Approved IMA 1976

Locality:

Menzenschwald, Schwarzwald, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for J. Frederic Joliot (1900-1958), French physicist, and I. Joliot-Curie.

Name Pronunciation:

Joliotite + Pronunciation

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Joliotite Crystallography

Axial Ratios:

a:b:c =0.7884:1:0.6106

Cell Dimensions:

a = 8.16, b = 10.35, c = 6.32, Z = 4; V = 533.76 Den(Calc)= 4.56

Crystal System:

OrthorhombicSpace Group: P 222, Pmm2

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

By Intensity(I/I_o): 8.09(1), 3.42(0.9), 3.18(0.8),

Physical Properties of Joliotite

Cleavage:

{100} Distinct

Color:

Lemon yellow.

Density:

4.55

Diaphaneity:

Translucent

Habit:

Scaly - Morphology like fish scales.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Weakly Fluorescent.

Streak:

yellow

Optical Properties of Joliotite

Gladstone-Dale:

CI meas= -0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.138,KPDmeas= 0.1383,KC= 0.1326
Ncalc = 1.6

Optical Data:

Biaxial (-), a=1.6, b=1.644, g=1.644, bire=0.0440, 2V(Calc)=0, 2V(Meas)=small.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

yellow.

Calculated Properties of Joliotite

Electron Density:

Bulk Density (Electron Density)=3.94 gm/cc
note: Specific Gravity of Joliotite =4.56 gm/cc.

Fermion Index:

Fermion Index = 0.0051910974
Boson Index = 0.9948089026

Photoelectric:

PE_Joliotite=1,709.03 barns/electron
U=PE_Joliotite x r_electron=6,727.28 barns/cc.

Radioactivity:

GRapi = 4,784,408.53 (Gamma Ray American Petroleum Institute Units)
Concentration of Joliotite per GRapi unit = 209.01 (PPB)

Joliotite 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) 6.36 ± 1.59 grams of pure Joliotite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 635.75 ±158.94 grams of pure Joliotite .

**Estimated Radioactivity from Joliotite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.48 cm	116,391,588	3.15E-03	4,784,408.53	1,572.96
100 gm / 3.47 cm	11,639,159	3.15E-04	478,440.85	157.30
10 gm / 1.61 cm	1,163,916	3.15E-05	47,844.09	15.73
1 gm / 7.48 mm	116,392	3.15E-06	4,784.41	1.57
0.1 gm / 3.47 mm	11,639	3.15E-07	478.44	0.16
0.01 gm / 1.61 mm	1,164	3.15E-08	47.84	0.02
0.001 gm / 0.75 mm	116	3.15E-09	4.78	0.00

Weight of pure Joliotite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.56 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

Joliotite Classification

Dana Class:

15.01.08.01 (15)Hydrated Carbonates

(15.01)where A+ (XO3) · x(H2O)

(15.01.08)Joliotite Group

15.01.08.01 Joliotite (UO2)(CO3)•n(H2O),(n=2?) P 222, Pmm2 Ortho

15.01.08.02 Blatonite! UO2CO3•(H2O) Unk Hex

15.01.08.03 Oswaldpeetersite! (UO2)2CO3(OH)2•4(H2O) P 2₁/c 2/m

Strunz Class:

05.EB.15 05 - CARBONATES (NITRATES)

05.E - Uranyl Carbonates

05.EB -UO2:CO3 = 1:1

05.EB.15 Joliotite (UO2)(CO3)•n(H2O),(n=2?) P 222, Pmm2 Ortho

Other Joliotite Information

References:

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

See Also:

Links to other databases for Joliotite :
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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Print or Cut-and-Paste your Joliotite Specimen Label here :

Joliotite

(UO2)(CO3)•n(H2O), (n=2?)
Dana No: 15.01.08.01 Strunz No: 05.EB.15
Locality:

Notes: