Mineral Information and Data:

Fersmite
(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 [CNMNC approved formula]

Named for Aleksandr Evgenevich Fersman (1883-1945), eminent Russian mineralogist, geochemist, and gemologist.

IMA status : Valid species (Pre-IMA 1946) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
08.03.03.01  
  (08) Multiple Oxides with Nb, Ta, and Ti
  (08.03) where A (B2O6)
  (08.03.03)
  
Nickel-Strunz
(10th edition) :
04.DG.05
  (04) Oxides and Hydroxides
  (04.D) Metal:Oxygen = 1:2 and similar
  (04.DG) With large (+- medium-sized) cations; chains of edge-sharing octahedra
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

<<< BACK TO MINERAL SEARCH