Mineral Information and Data:

Delindeite
Na2Ba2Ti3(Si2O7)2O2(OH)2 • 2H2O [CNMNC approved formula]

Named for Henry deLinde, long time mineral collector and owner of the Diamond Jo quarry.

IMA status : Approved Species 1987 ()
CLASSIFICATION 
Dana
(8th edition) :
56.02.06c.02  
  (56) Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02) with cations in [4] and/or >[4] coordination
  (56.02.06c) Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)
  
Nickel-Strunz
(10th edition) :
09.BE.60
  (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): 2/m — prismatic
  
  
  

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