Mineral Information and Data:

Silvialite
Ca4Al6Si6O24(SO4) [CNMNC approved formula]

Named for Silvia Hillebrand, daughter of G. Tschermak, was first suggested in 1914 for the then-hypothetical SO4 analog of meionite.

IMA status : Approved Species 1999 ()
CLASSIFICATION 
Dana
(8th edition) :
76.03.01.03  (This Dana# Added)
  (76) Tectosilicate Al-Si Framework
  (76.03) Framework with other Be/Al/Si frameworks
  (76.03.01) Scapolite group
  
Nickel-Strunz
(10th edition) :
09.FB.15
  (09) Silicates
  (09.F) Tektosilicates without Zeolitic H2O
  (09.FB) Tektosilicates with additional anions
  
Crystal system: Tetragonal System
Point group (H-M): 4/m — dipyramidal
  
  
  

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