AM_Hafnon Formula: Hf Si O4 Name: Hafnon Unit cell: 6.5725 6.5725 5.9632 90.0 90.0 90.0 , V=257.60 Space group: I41/AMD (141)

Speer J A , Cooper B J , American Mineralogist , 67 (1982) p.804-808, Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the, actinide orthosilicates