Mineral Information and Data:

Eifelite
KNa2(MgNa)(Mg3Si12)O30 [CNMNC approved formula]

Named for the locality: Bellerberg volcano, two km north of Mayen, Eifel district, Germany.

IMA status : Approved Species 1980 ()
CLASSIFICATION 
Dana
(8th edition) :
63.02.01a.04  
  (63) Cyclosilicate Condensed Rings
  (63.02) 6-membered rings
  (63.02.01a) Milarite - Osumilite group (Milarite - Osumilite subgroup)
  
Nickel-Strunz
(10th edition) :
09.CM.05
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CM) [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
  
Crystal system: Hexagonal System
Point group (H-M): 6/mmm (or 6/m 2/m 2/m) — dihexagonal-dipyramidal
  
  
  

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