Moluranite Mineral Data
General Moluranite Information
Chemical Formula:
H4U++++(UO2)3(MoO4)7•18(H2O)
Composition:
Molecular Weight = 2,495.98 gm
Uranium 38.15 % U 43.27 % UO2
Molybdenum 26.91 % Mo 40.37 % MoO3
Hydrogen 1.62 % H 14.44 % H2 O
Oxygen 33.33 % O
______ ______
100.00 % 98.08 % = TOTAL OXIDE
Empirical Formula:
H4 U(UO2 )3 (MoO4 )7 •18(H2 O)
Environment:
In fine fissures in granulated albite, in part replacing brannerite.
IMA Status:
Approved IMA 1959
Locality:
Aleksandrovskii Golets Mo�U deposit, upper Chetkanda River, Udokan Range, Chara region, northern Transbaikal, Russia. Link to MinDat.org Location Data.
Name Origin:
Named for the MOLybdenum and URANium in the composition.
Name Pronunciation:
Moluranite + Pronunciation
Moluranite Image
Images:
Moluranite Crystallography
Crystal System:
Amorphous - No Crystals
Physical Properties of Moluranite
Cleavage:
None
Color:
Black, Brown.
Density:
4
Diaphaneity:
Translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Hardness:
3-4 - Calcite-Fluorite
Luster:
Resinous
Streak:
brown
Optical Properties of Moluranite
Gladstone-Dale:
CI meas = -0.296 (Poor) - where the CI = (1-KPDmeas /KC ) KPDmeas = 0.2438,KC = 0.188 Ncalc = 1.75
Optical Data:
Isotropic, n=1.97-1.98.
Calculated Properties of Moluranite
Electron Density:
Bulk Density (Electron Density)=3.58 gm/cc note: Specific Gravity of Moluranite =4.00 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PEMoluranite =1,012.05 barns/electronU=PEMoluranite x r electron =3,626.53 barns/cc.
Radioactivity:
GRapi = 2,912,811.10 (Gamma Ray American Petroleum Institute Units)
Concentration of Moluranite per GRapi unit = 343.31 (PPB)
Moluranite 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)
10.44 ± 2.61 grams of pure Moluranite .
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 100 cm box)
1044.2 ±261.06 grams of pure Moluranite .
Estimated Radioactivity from Moluranite - 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 / 7.82 cm
68,281,219
1.85E-03
2,912,811.10
957.64
100 gm / 3.63 cm
6,828,122
1.85E-04
291,281.11
95.76
10 gm / 1.68 cm
682,812
1.85E-05
29,128.11
9.58
1 gm / 7.82 mm
68,281
1.85E-06
2,912.81
0.96
0.1 gm / 3.63 mm
6,828
1.85E-07
291.28
0.10
0.01 gm / 1.68 mm
683
1.85E-08
29.13
0.01
0.001 gm / 0.78 mm
68
1.85E-09
2.91
0.00
Weight of pure Moluranite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.00 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
Moluranite Classification
Dana Class:
49.01.02.01 (49) Basic and Hydrated Molybdates and Tungstates
(49.01) (Acid Hydrated)
(49.01.02) Dana Group
49.01.02.01 Moluranite H4U(UO2)3(MoO4)7•18(H2O) None
Strunz Class:
07.HA.15 07 - SULFATES (SELENATES, TELLURATES)
07.H - Uranium and Uranyl Molybdates and Wolframates
07.HA -With U4+
07.HA.15 Moluranite H4U(UO2)3(MoO4)7•18(H2O) None
Other Moluranite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Moluranite :
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 Moluranite Specimen Label here :
Moluranite
H4U++++(UO2)3(MoO4)7•18(H2O)
Dana No: 49.01.02.01 Strunz No: 07.HA.15
Locality:
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