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Jules Cousin
MgU2Mo2O11 · 6H2O
Named in 1958 by J.F. Vaes after Jules Cousin (Comblain-au-Pont, Liège province, Belgium, January 12 1884 - Brussels, November 12 1965). He worked for the Union Minière du Haut-Katanga, in Africa and in Belgium.
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.

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Classification of CousiniteHide

Approved, 'Grandfathered' (first described prior to 1959), Questionable

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

3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen

27 : Sulphites, Chromates, Molybdates and Tungstates
3 : Molybdates

Chemical Properties of CousiniteHide

MgU2Mo2O11 · 6H2O
IMA Formula:
MgU4+2(MoO4)2(OH)6 · 2H2O (?)

Type Occurrence of CousiniteHide

Other Language Names for CousiniteHide


Related Minerals - Nickel-Strunz GroupingHide

7.HA.15MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2OAmor.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.3.1LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
27.3.2PowelliteCa(MoO4)Tet. 4/m : I41/a
27.3.3WulfenitePb(MoO4)Tet. 4/m : I41/a
27.3.4KoechliniteBi2MoO6Orth. mm2 : Pna21
27.3.7Iriginite(UO2)Mo2O7 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
27.3.8Umohoite(UO2)MoO4 · 2H2OTric.
27.3.9MoluraniteH4U4+(UO2)3(MoO4)7 · 18H2OAmor.
27.3.11Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2OMon.
27.3.12TengchongiteCaO · 6UO3 · 2MoO3 · 12H2OOrth.
27.3.14FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn

Other InformationHide

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 CousiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Davidson, G.F. (1954) in Summary of progress Geol. Surv. G. Gr.: 70.
Vaes, J.F. (1958) Cousiniet, een nieuw uraanmineral. Geologie en Mijnbouw: 20: 449.
Fleischer, M. (1959) New Mineral Names. American Mineralogist: 44: 906-910.
Deliens, M. (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.
Deliens, M., Piret, P. (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 CousiniteHide

Localities for CousiniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
DR Congo (TL)
  • Haut-Katanga
    • Kambove District
      • Shinkolobwe
Vaes, J.F. (1958) Cousiniet, een nieuw uraanmineraal. Geologie en Mijnbouw, 20, 12, 449 (in Dutch).; Fleischer, M. (1959) New Mineral Names. American Mineralogist, 44(7-8), 910.; Deliens, M. (1996) Overzicht van de mineralogie van de koper-, kobalt- en uraniumvoorkomens in Zuid-Shaba (Zaïre). Pages 35-49 in: Schatten der Aarde. Van mineraal tot juweel. Tentoonstelling in de abdij Saint-Gérard de Brogne van 27 april tot 27 oktober 1996. Catalogus opgemaakt onder de leiding van R. Warin, AGAB en P. Van hee, MKA (in Dutch).
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