Mineral Information and Data:

Brugnatellite
Mg6Fe3+CO3(OH)13 • 4H2O [CNMNC approved formula]

Named after Luigi Brugnatelli (1859-1928), mineralogist, University of Pavia, Italy.

IMA status : Valid species (Pre-IMA 1909) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
16b.07.05.01  
  (16b) Carbonates - Hydroxyl or Halogen
  (16b.07)
  (16b.07.05)
  
Nickel-Strunz
(10th edition) :
05.DA.45
  (05) Carbonates and Nitrates
  (05.D) Carbonates with Additional Anions, with H2O
  (05.DA) With medium-sized cations
  
Crystal system: Hexagonal System
Point group (H-M): 6/mmm (or 6/m 2/m 2/m) — dihexagonal-dipyramidal
  
  
  

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