Mineral Information and Data:

Sitinakite
KNa2Ti4Si2O13(OH) • 4H2O [CNMNC approved formula]

Named forr SIlicon; TItanium; sodium, NAtrium; and potassium, Kalium, in its composition.

IMA status : Approved Species 1992 ()
CLASSIFICATION 
Dana
(8th edition) :
52.04.11.01  
  (52) Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04) with cations in [6] and/or > [6] coordination
  (52.04.11)
  
Nickel-Strunz
(10th edition) :
09.AG.30
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AG) Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  

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