Cousinite Mineral Data

Cousinite Mineral Data

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General Cousinite Information

Chemical Formula:

MgU2Mo2O13·6(H2O) (?)

Composition:

Molecular Weight = 1,008.33 gm

Magnesium 2.41 % Mg 4.00 % MgO

Uranium 47.21 % U 56.73 % UO₃

Molybdenum 19.03 % Mo 28.55 % MoO₃

Hydrogen 1.20 % H 10.72 % H₂O

Oxygen 30.15 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MgU₂Mo₂O₁₃·6(H₂O)

Environment:

Alteration product of ores containing uraninite and molybdenite. An inadequately characterized mineral.

IMA Status:

Approved IMA 1958

Locality:

Shinkolobwe, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Jules Cousin (1884-1965), Belgian, president of Union Miniere du Haut Katanga.

Cousinite Image

Images:

Cousinite

Comments: minute aggregate of greenish black platy crystals of Cousinite.
Location: Shinkolobwe, Katanga, Shaba, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cousinite Crystallography

Crystal System:

MonoclinicSpace Group: ?

Physical Properties of Cousinite

Color:

Black.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Luster:

Vitreous (Glassy)

Calculated Properties of Cousinite

Fermion Index

Fermion Index = 0.05442
Boson Index = 0.94558

Photoelectric:

PE_Cousinite=1,249.42 barns/electron
U=PE_Cousinite x r_electron= . barns/cc.

Radioactivity:

GRapi = 3,544,080.60 (Gamma Ray American Petroleum Institute Units)

Cousinite 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) 8.58 ± 2.15 grams of pure Cousinite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 858.24 ±214.56 grams of pure Cousinite .

**Estimated Radioactivity from Cousinite** - 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	84,510,644	2.28E-03	3,544,080.60	1,165.18
100 gm	8,451,064	2.28E-04	354,408.06	116.52
10 gm	845,106	2.28E-05	35,440.81	11.65
1 gm	84,511	2.28E-06	3,544.08	1.17
0.1 gm	8,451	2.28E-07	354.41	0.12
0.01 gm	845	2.28E-08	35.44	0.01
0.001 gm	85	2.28E-09	3.54	0.00

Weight of pure Cousinite in grams (gm).*
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

Cousinite Classification

Dana Class:

49.3.2.1 (49)Basic and Hydrated Molybdates and Tungstates

(49.3)(Hydrated, containing Hydroxyl or Halogen)

(49.3.2)Dana Group

49.3.2.1 Cousinite MgU2Mo2O13·6(H2O)(?) ? Mono

Strunz Class:

VI/G.06-30 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/G.06 - Deloryite - Iriginite series

VI/G.06-05 Deloryite Cu4(UO2)(MoO4)2(OH)6 C 2/m 2/m

VI/G.06-10 Calcurmolite Ca(UO2)3(MoO4)3(OH)2·11(H2O) Unk Mono

VI/G.06-20 Tengchongite CaU6Mo2O25·12(H2O) A2122 2 2 2

VI/G.06-30 Cousinite MgU2Mo2O13·6(H2O)(?) ? Mono

VI/G.06-40 Iriginite (UO2)(Mo2O7)·3(H2O) Pbcm 2/m 2/m 2/m

Other Cousinite Information

References:

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

See Also:

Links to other databases for Cousinite :
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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Cousinite

MgU2Mo2O13·6(H2O) (?)
Dana No: 49.3.2.1 Strunz No: VI/G.06-30
Locality:

Notes: