Mineral Information and Data:

Fibroferrite
Fe3+SO4(OH) • 5H2O [CNMNC approved formula]

Named From the Latin, fibra, meaning "fibre" and ferrum, meaning "iron.".

IMA status : Valid species (Pre-IMA 1833) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
31.09.12.01  
  (31) Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09) where (A+ B++) (XO4) Zq · x(H2O)
  (31.09.12)
  
Nickel-Strunz
(10th edition) :
07.DC.15
  (07) Sulfates (selenates, tellurates, chromates, molybdates, wolframates)
  (07.D) Sulfates (selenates, etc.) with additional anions, with H2O
  (07.DC) With only medium-sized cations; chains of edge-sharing octahedra
  
Crystal system: Trigonal System
Point group (H-M): 3 — rhombohedral
  
  
  
Other Properties: H2O Soluble.

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