Mineral Information and Data:

Bornemanite
Na6BaTi2Nb(Si2O7)2(PO4)O2(OH)F [CNMNC approved formula]

Named or Irina Dimitrievna Borneman-Starynkevich (1890-), Russian mineralogist, Institute of Ore Deposits, Moscow. She was a student of the mineralogy of the Khibiny and Lovozero ma ssifs.

IMA status : Approved Species 1975 ()
CLASSIFICATION 
Dana
(8th edition) :
56.04.02.01  
  (56) Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.04) with [Si2O7] with phosphate, water
  (56.04.02) Bornemanite Group
  
Nickel-Strunz
(10th edition) :
09.BE.50
  (09) Silicates
  (09.B) Sorosilicates (dimer) structures
  (09.BE) Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination
  
Crystal system: Monoclinic System
Point group (H-M): m — domatic
  
  
  

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