Hafnon
Speer J A, Cooper B J
American Mineralogist 67 (1982) 804-808
Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the
actinide orthosilicates
_database_code_amcsd 0000871
6.5725 6.5725 5.9632 90 90 90 *I4_1/amd
0 -.25 .125
atom x     y     z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Hf   0   .75  .125      0.0035 0.0035 0.0034      0      0      0
Si   0   .75 .6250 0.05
O    0 .0655 .1948 0.73