Mineral Information and Data:

Cerchiaraite
Ba4Mn4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl [CNMNC approved formula]

Named for the locality: Cerchiara manganese (braunite) mine, Val di Vara, eastern Liguria, Italy.

IMA status : Approved Species 1999 ()
CLASSIFICATION 
Dana
(8th edition) :
62.01.01.02  (This Dana# Added)
  (62) Cyclosilicate Eight-Membered Rings
  (62.01) with 8-membered and larger rings
  (62.01.01) Muirite Group
  
Nickel-Strunz
(10th edition) :
09.CF.25
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CF) [Si4O12]8- 4-membered single rings, with insular complex anions
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  

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