Mineral Information and Data:

Ferrokentbrooksite
Na15Ca6Fe2+3Zr3Nb(Si25O73)(O,OH,H2O)3(F,Cl)2 [CNMNC approved formula]

Named as the Fe-analogue of kentbrooksite.

IMA status : Approved Species 2003 ()
CLASSIFICATION 
Dana
(8th edition) :
64.01.01.07  (This Dana# Added)
  (64) Cyclosilicates
  (64.01) Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
  (64.01.01) Eudialyte Group
  
Nickel-Strunz
(10th edition) :
09.CO.10
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CO) [Si9O27]18- 9-membered rings
  
Crystal system: Trigonal System
Point group (H-M): 3m — ditrigonal-pyramidal
  
  
  

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