Cousinite

MgU4+2(MoO4)2(OH)6 · 2H2O (?)
IMA status
  • Approved
  • Grandfathered
  • Questionable
IMA symbol
Cus
Discovered
1958
Also known as
  • Cousiniet

Where it forms, where it's found

Type locality
Shinkolobwe Mine
  1. Shinkolobwe
  2. Kambove Territory
  3. Haut-Katanga
  4. DR Congo

-11.0486°, 26.5508°

1recorded occurrences
Source · OpenStreetMap

Radioactivity

Physical

Transparency
Translucent
Colour
Black

Crystallography

Type-locality form

thin blades

Comment

No crystallographic data

Synonyms

  • Cousiniet

In other languages

German
Cousinit
Italian
Cousinite
Chinese
钼镁铀矿

Classification

Strunz
10th ed.

7.HA.10

  • 7SulfatesClass
  • 7.HUranium and uranyl molybdates and wolframatesDivision
  • 7.HAWith U4+Group
  • 7.HA.10CousiniteSpecies
Dana
8th ed.

49.03.02.01

  • 49Hydrated Molybdates and TungstatesClass
  • 49.03Hydrated Molybdates and Tungstates Containing Hydroxyl or HalogenType
  • 49.03.02— unnamed intermediate level —Group
  • 49.03.02.01CousiniteSpecies
CIM

27.3.10

  • 27Sulphites, Chromates, Molybdates and TungstatesClass
  • 27.3MolybdatesGroup
  • 27.3.10CousiniteSpecies

Literature, links & citation

Citations
  1. 1954Davidson, G.F. (1954) in Summary of progress Geol. Surv. G. Gr.: 70.
  2. 1958Vaes, J.F. (1958) Cousiniet, een nieuw uraanmineral. Geologie en Mijnbouw: 20: 449.
  3. 1959Fleischer, M. (1959) New Mineral Names. American Mineralogist, 44 (7-8). 906-910
  4. 1975Deliens, 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.
  5. 1976Deliens, 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.
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Cousinite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/cousinite-1143},
  note      = {Accessed 2026-05-11}
}