Mineral Information and Data:

Cervandonite-(Ce)
(Ce,Nd,La)(Fe3+,Ti,Fe2+,Al)3O2(Si2O7)1-x+y(AsO3)1+x-y(OH)3x-3y,x=0.5,y=0.3 [CNMNC approved formula]

Named for the locality: Pizzo Cervandone, Alpe Devero, Italy.

IMA status : Approved Species 1988 ()
CLASSIFICATION 
Dana
(8th edition) :
43.04.12.01  
  (43) Compound Phosphates
  (43.04) (Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.12)
  
Nickel-Strunz
(10th edition) :
09.BE.092
  (09) Silicates
  (09.B) Sorosilicates (dimer) structures
  (09.BE) Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
  
Crystal system: Monoclinic System
Point group (H-M): m — domatic
  
  
  

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