Mineral Information and Data:

Okanoganite-(Y)
(Y,REE,Ca,Na,Th)16(Fe3+,Ti)(Si,B,P)10(O,OH)38F10 [CNMNC approved formula]

Named for the locality: Golden Horn Batholith, near Washington Pass, Okanongan County, Washington, USA.

IMA status : Approved Species 1980 ()
CLASSIFICATION 
Dana
(8th edition) :
54.02.04.03  
  (54) Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02) with B in [4] coordination
  (54.02.04) Howlite and related species
  
Nickel-Strunz
(10th edition) :
09.AJ.35
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AJ) Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
  
Crystal system: Trigonal System
Point group (H-M): 3m — ditrigonal-pyramidal
  
  
  

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