Moluranite Mineral Data

Moluranite Mineral Data +

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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 % H₂O

Oxygen 33.33 % O

______ ______

100.00 % 98.08 % = TOTAL OXIDE

Empirical Formula:

H₄U(UO₂)₃(MoO₄)₇·18(H₂O)

IMA Status:

Approved IMA 1959

Locality:

Link to MinDat.org Location Data.

Moluranite Image

Images:

Moluranite

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

Crystal System:

Amorphous- No Crystals

Physical Properties of Moluranite

Cleavage:

None

Color:

Black, Brown.

Density:

Diaphaniety:

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

Optical Data:

Isotropic, n=1.97-1.98.

Calculated Properties of Moluranite

Electron Density:

r_electron=3.58 gm/cc
note: r_Moluranite=4.00 gm/cc.

Fermion Index

Fermion Index = 0.07143
Boson Index = 0.92857

Photoelectric:

PE_Moluranite=1,012.05 barns/electron
U=PE_Moluranite x r_electron=3,626.53 barns/cc.

Radioactivity:

GRapi = 2,912,810.63 (Gamma Ray American Petroleum Institute Units)

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	68,281,215	1.85E-03	2,912,810.63	957.64
100 gm / 3.63 cm	6,828,122	1.85E-04	291,281.06	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:

49.1.2.1 (49)Basic and Hydrated Molybdates and Tungstates

(49.1)(Acid Hydrated)

(49.1.2)Dana Group

49.1.2.1 Moluranite H4U(UO2)3(MoO4)7·18(H2O) None

Strunz Class:

VI/G.05-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/G - Uranylmolybdates with [UO2]4+ - [MoO4]2-

VI/G.05 - Mourite - Moluranite series

VI/G.05-10 Mourite UMo5O12(OH)10 Pc or P 2/c Mono

VI/G.05-20 Umohoite [(UO2)MoO4]·H2O P1 1

VI/G.05-30 Moluranite H4U(UO2)3(MoO4)7·18(H2O) None

Other Moluranite Information

References:

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 -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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Ask about Moluranite here :
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Print or Cut-and-Paste your Moluranite Specimen Label here :

Moluranite

H4U++++(UO2)3(MoO4)7·18(H2O)
Dana No: 49.1.2.1 Strunz No: VI/G.05-30
Locality:

Notes: