Mineral Information and Data:

Hafnon
HfSiO4 [CNMNC approved formula]

Named for the composition containing hafnium.

IMA status : Approved Species 1974 ()
CLASSIFICATION 
Dana
(8th edition) :
51.05.02.02  
  (51) Nesosilicate Insular SiO4 Groups Only
  (51.05) with cations in >[6] coordination
  (51.05.02) Zircon group
  
Nickel-Strunz
(10th edition) :
09.AD.30
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AD) Nesosilicates without additional anions; cations in [6] and/or greater coordination
  
Crystal system: Tetragonal System
Point group (H-M): 4/mmm (or 4/m 2/m 2/m) — ditetragonal-dipyramidal
  
  
  

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