Mineral Information and Data:

Brenkite
Ca2(CO3)F2 [CNMNC approved formula]

Named for the locality: Schellkopf, 0.5 km west of Brenk, Eifel district, Germany.

IMA status : Approved Species 1978 ()
CLASSIFICATION 
Dana
(8th edition) :
16a.03.06.01  
  (16a) Carbonates - Hydroxyl or Halogen
  (16a.03) where (A B)2 (XO3) Zq
  (16a.03.06)
  
Nickel-Strunz
(10th edition) :
05.BC.05
  (05) Carbonates and Nitrates
  (05.B) Carbonates with additional anions, without H2O
  (05.BC) With alkali-earth cations
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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