Mineral Information and Data:

Cassagnaite
Ca4Fe3+4V3+2(OH)6O2(Si3O10)(SiO4)2 [CNMNC approved formula]

Named after the locality: Cassagna mine, Val Graveglia, eastern Liguria, northern Apennines, Italy.

IMA status : Approved Species 2006 ()
CLASSIFICATION 
Dana
(8th edition) :
57.02.03.03  (This Dana# Added)
  (57) Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
  (57.02) with [Si4O13] groups
  (57.02.03) Akatoreite Group
  
Nickel-Strunz
(10th edition) :
09.BJ.65
  (09) Silicates
  (09.B) Sorosilicates (dimer) structures
  (09.BJ) Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  

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