data_global
_chemical_name_mineral 'Hafnon'
loop_
_publ_author_name
'Speer J A'
'Cooper B J'
_journal_name_full 'American Mineralogist'
_journal_volume 67 
_journal_year 1982
_journal_page_first 804
_journal_page_last 808
_publ_section_title
;
 Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the
 actinide orthosilicates
;
_database_code_amcsd 0000871
_chemical_formula_sum 'Hf Si O4'
_cell_length_a 6.5725
_cell_length_b 6.5725
_cell_length_c 5.9632
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 257.597
_exptl_crystal_density_diffrn      6.977
_symmetry_space_group_name_H-M 'I 41/a m d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/4-y,3/4-x,1/4+z'
  '3/4-y,1/4-x,3/4+z'
  '1/4+y,3/4+x,1/4-z'
  '3/4+y,1/4+x,3/4-z'
  '1/4+y,3/4-x,1/4-z'
  '3/4+y,1/4-x,3/4-z'
  '1/4-y,3/4+x,1/4+z'
  '3/4-y,1/4+x,3/4+z'
  '1/2+x,-y,1/2+z'
  '+x,1/2-y,+z'
  '1/2-x,y,1/2-z'
  '-x,1/2+y,-z'
  '1/2+x,y,1/2-z'
  '+x,1/2+y,-z'
  '1/2-x,-y,1/2+z'
  '-x,1/2-y,+z'
  '1/4+y,1/4+x,3/4+z'
  '3/4+y,3/4+x,1/4+z'
  '1/4-y,1/4-x,3/4-z'
  '3/4-y,3/4-x,1/4-z'
  '1/4-y,1/4+x,3/4-z'
  '3/4-y,3/4+x,1/4-z'
  '1/4+y,1/4-x,3/4+z'
  '3/4+y,3/4-x,1/4+z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Hf   0.00000   0.75000   0.12500 ?
Si   0.00000   0.75000   0.62500   0.00063
O   0.00000   0.06550   0.19480   0.00925
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Hf 0.00766 0.00766 0.00613 0.00000 0.00000 0.00000