Mineral Information and Data:

Gaidonnayite
Na2ZrSi3O9 • 2H2O [CNMNC approved formula]

Named for Gabrielle Hamburger Donnay (1920-1987), crystallographer and mineralogist, McGill University.

IMA status : Approved Species 1974 ()
CLASSIFICATION 
Dana
(8th edition) :
59.02.02.03  
  (59) Cyclosilicate Three-Membered Rings
  (59.02) hydrated
  (59.02.02) Catapleiite group
  
Nickel-Strunz
(10th edition) :
09.DM.15
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DM) with 6-periodic single chains
  
Crystal system: Orthorhombic System
Point group (H-M): mm2 — pyramidal
  
  
  

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