Mineral Information and Data:

Voltaite
K2Fe2+5Fe3+3Al(SO4)12 • 18H2O [CNMNC approved formula]

Named after the Italian physicist, Alessandro G. A. A. Volta (1745-1841).

IMA status : Valid species (Pre-IMA 1841) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
29.09.01.01  
  (29) Hydrated Acid and Sulfates
  (29.09) with miscellaneous formulae
  (29.09.01) Voltaite Group
  
Nickel-Strunz
(10th edition) :
07.CC.25
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.C) Sulfates (selenates, etc.) without Additional Anions, with H2O
  (07.CC) With medium-sized and large cations
  
Crystal system: Cubic System
Point group (H-M): m3m (or 4/m 3 2/m) — hexoctahedral
  
  
  
Other Properties: H2O Soluble.

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