Mineral Information and Data:

Cleusonite  
Pb(U4+,U6+)Fe2+2(Ti,Fe2+,Fe3+)18(O,OH)38 [CNMNC approved formula]

Named for the locality : Barrage de Cleuson, Val de Nendaz, Switzerland.

IMA status : Approved Species 2001 ()
CLASSIFICATION 
Dana
(8th edition) :
08.05.01.10  
  (08) Multiple Oxides with Nb, Ta, and Ti
  (08.05)
  (08.05.01) Crichtonite group (ABC18 T2 O38)
  
Nickel-Strunz
(10th edition) :
04.CC.40
  (04) Oxides and Hydroxides
  (04.C) Metal:Oxygen = 2:3, 3:5, and Similar
  (04.CC) With large and medium-sized cations
  
Crystal system: Trigonal System
Point group (H-M): 3 — rhombohedral
  
  
  
Other Properties: Radioactive.

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