Mineral Information and Data:

Ilimaussite-(Ce)
(Ba,Na)10K3Na4.5Ce5(Nb,Ti)6O6(Si12O36)(Si9O18)(O,OH)24 [CNMNC approved formula]

Named for the locality: Ilimaussaq alkaline complex, South Greenland.

IMA status : Approved Species 1968 ()
CLASSIFICATION 
Dana
(8th edition) :
78.07.04.01  
  (78) Unclassified silicates
  (78.07) wholly unclassified silicates
  (78.07.04)
  
Nickel-Strunz
(10th edition) :
09.CB.15
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CB) [Si3O9]6- 3-membered single rings, with insular complex anions
  
Crystal system: Trigonal System
Point group (H-M): 3 — pyramidal
  
  
  

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