Mineral Information and Data:

Stoppaniite
Fe3+2Be3Si6O18 • H2O [CNMNC approved formula]

Named for the mineral collector Francesco Saverio Stoppani (1947-).

IMA status : Approved Species 1996 ()
CLASSIFICATION 
Dana
(8th edition) :
61.01.01.04  (This Dana# Added)
  (61) Cyclosilicate Six-Membered Rings
  (61.01) with [Si6O18] rings; possible (OH) and Al substitution
  (61.01.01) Beryl group
  
Nickel-Strunz
(10th edition) :
09.CJ.05
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CJ) [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
  
Crystal system: Hexagonal System
Point group (H-M): 6/mmm (or 6/m 2/m 2/m) — dihexagonal-dipyramidal
  
  
  

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