Mineral Information and Data:

Grimaldiite
CrO(OH) [CNMNC approved formula]

Named for Frank Saverio Grimaldi (1915- ), formerly Chief Chemist, U.S. Geological Survey.

IMA status : Approved Species 1967 ()
CLASSIFICATION 
Dana
(8th edition) :
06.01.05.01  
  (06) Hydroxides and Oxides Containing Hydroxyl
  (06.01) where X+++O OH
  (06.01.05)
  
Nickel-Strunz
(10th edition) :
04.FE.20
  (04) Oxides and Hydroxides
  (04.F) Hydroxides (without V or U)
  (04.FE) Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
  
  
  

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