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Cousinite

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Formula:
MgU2Mo2O11 · 6H2O
Possibly a "Mg-Umohoite". Reinvestigation by modern methods needed.

Davison (1954) describes also an uran molybdate of Mg as monoclinic / pseudo-orthorombic with a = 6.37, b = 33.46, c = 15.0 A and beta = 90°. This mineral is listed in the recent compilation of unnamed species (Smith & Nickel, 2007) as UM1954-// - MoO-MgU.

Classification of Cousinite

Questionable/Doubtful
Explanation of status:
Fleischer's comment in the American Mineralogist in the New Minerals section: "No physical properties or x-ray data are given, nor is the origin of the name stated. Discussion.-Insufficient data. Compare with moluranite, Am. Mineral. 43, 380 (1958)."
Possibly a "Mg-Umohoite".
7.HA.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
H : Uranium and uranyl molybdates and wolframates
A : With U4+
49.3.2.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen
27.3.10

27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates
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First Recorded Occurrence of Cousinite

Year of Discovery:
1958

Chemical Properties of Cousinite

Formula:
MgU2Mo2O11 · 6H2O
Essential elements:
All elements listed in formula:
Analytical Data:
After deduction of wulfenite impurity.
UO2 (58.10)
MoO3 (27.17)
MgO (4.31)
H2O (10.42) 

Relationship of Cousinite to other Species

7.HA.05SedoviteU(MoO4)2
7.HA.15MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2O
27.3.1LindgreniteCu3(MoO4)2(OH)2
27.3.2PowelliteCa(MoO4)
27.3.3WulfenitePb(MoO4)
27.3.4KoechliniteBi2MoO6
27.3.5SedoviteU(MoO4)2
27.3.6MouriteUMo5O12(OH)10
27.3.7Iriginite(UO2)Mo2O7 · 3H2O
27.3.8Umohoite(UO2)MoO4 · 2H2O
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2O
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
27.3.12TengchongiteCaO · 6UO3 · 2MoO3 · 12H2O
27.3.13KamiokiteFe2Mo3O8
27.3.14FerrimolybditeFe2(MoO4)3 · nH2O

Other Names for Cousinite

Name in Other Languages:
German:Cousinit
Spanish:Cousinita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cousinite

Reference List:
G.F. Davidson (1954): in Summary of progress Geol. Surv. G. Gr., p.70

J.F. Vaes (1958): "Cousiniet, een nieuw uraanmineral". Geologie en Mijnbouw
20, 449.

American Mineralogist: 44: 910.

M. Deliens (1975): "Une association de molybdates d'uranium de Shinkolobwe (région du Shaba, République du Zaïre)". Annales de la Société Géologique de Belgique 98, 155-160.

M. Deliens & P. Piret (1976): "Nouvelles sonnées sur une umohoite magnésienne de Shinkolobwe (région du Shaba, République du Zaïre)". Annales de la Société Géologique de Belgique 99, 205-209.

Internet Links for Cousinite

Localities for Cousinite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Democratic Republic of Congo (Zaïre) (FRL)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Shinkolobwe
Vaes, J. F. (1959) American Mineralogist: 44: 910.
Mineral and/or Locality  
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