Mineral Information and Data:

Fetiasite
(Fe2+,Fe3+,Ti4+)3O2As3+2O5 [CNMNC approved formula]

Named for the Fe, Ti, and As in its chemical composition.

IMA status : Approved Species 1994 ()
CLASSIFICATION 
Dana
(8th edition) :
45.01.13.01  
  (45) Acid and normal Antimonites, Arsenites and Phosphites
  (45.01) with miscellaneous formulae
  (45.01.13)
  
Nickel-Strunz
(10th edition) :
04.JB.05
  (04) Oxides and Hydroxides
  (04.J) Arsenites, Antimonites, Bismuthites, Sulfites,
  (04.JB) Arsenites, antimonites, bismuthites; with additional anions, without H2O
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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