Mineralogy Database

Moluranite Mineral Data

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General Moluranite Information

Help on Chemical  Formula: Chemical Formula: H4U++++(UO2)3(MoO4)7•18(H2O)
Help on Composition: 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 % H2O
   Oxygen      33.33 %  O
              ______        ______ 
              100.00 %       98.08 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: H4U(UO2)3(MoO4)7•18(H2O)
Help on Environment: Environment: In fine fissures in granulated albite, in part replacing brannerite.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: Aleksandrovskii Golets Mo´┐ŻU deposit, upper Chetkanda River, Udokan Range, Chara region, northern Transbaikal, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the MOLybdenum and URANium in the composition.
Help on Name Pronunciation: Name Pronunciation: Moluranite + Pronunciation Say MOLURANITE

Moluranite Image

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Comments: Dark gray-black moluranite coatings on sandstone.
Location: La Sal, San Juan County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Moluranite Crystallography

Help on Crystal System: Crystal System: Amorphous- No Crystals

Physical Properties of Moluranite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Brown.
Help on Density: Density: 4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Resinous
Help on Streak: Streak: brown

Optical Properties of Moluranite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.296 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2438,KC= 0.188
Ncalc = 1.75
Help on Optical Data: Optical Data: Isotropic, n=1.97-1.98.

Calculated Properties of Moluranite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Moluranite =4.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEMoluranite =1,012.05 barns/electron
U=PEMoluranite x relectron=3,626.53 barns/cc.
Help on Radioactivity: 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
Curies (Ci)
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

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.01)(Acid Hydrated)
  (49.01.02)Dana Group Moluranite H4U(UO2)3(MoO4)7•18(H2O) None
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 07.HA.15





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