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 % H2 O
Carbon 3.28 % C 12.02 % CO2
Oxygen 30.59 % O
______ ______
100.00 % 95.63 % = TOTAL OXIDE
Empirical Formula:
(UO2 )(CO3 )•2(H2 O)
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
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:
Orthorhombic Space Group: P 222, Pmm2
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEJoliotite =1,709.03 barns/electronU=PEJoliotite 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 Bequerols (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
Search for Joliotite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Joliotite :
Ask about Joliotite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
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:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.