Mineral Information and Data:

Nioboaeschynite-(Y)
(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6 [CNMNC approved formula]

Named for the dominant B-site cation, niobium and for the aeschynite group.

IMA status : Approved Species 2006 ()
CLASSIFICATION 
Dana
(8th edition) :
08.03.06.07  
  (08) Multiple Oxides with Nb, Ta, and Ti
  (08.03) where A (B2O6)
  (08.03.06) Aeschynite group
  
Nickel-Strunz
(10th edition) :
04.DF.05
  (04) Oxides and Hydroxides
  (04.D) Metal:Oxygen = 1:2 and similar
  (04.DF) With large (+- medium-sized) cations; dimers and trimers of edgesharing octahedra
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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