Mineral Information and Data:

Vicanite-(Ce)
(Ca,Ce,La,Th)15As5+(As3+,Na)0.5Fe3+0.7Si6B4(O,F)47 [CNMNC approved formula]

Named after its locality: Vican (Vico lake) volcanic complex at Tre Croci, Ventralla (north of Rome), Latium, Veterbo provicne, Italy.

IMA status : Approved Species 1995 ()
CLASSIFICATION 
Dana
(8th edition) :
54.03.01.01  
  (54) Nesosilicate Borosilicates and Some Beryllosilicates
  (54.03)
  (54.03.01) Vicanite Group
  
Nickel-Strunz
(10th edition) :
09.AJ.35
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AJ) Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
  
Crystal system: Trigonal System
Point group (H-M): 3m — ditrigonal-pyramidal
  
  
  
Comments: Radioactive.

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