data_9000852
_publ_section_title
;Crystal structure of synthetic hafnon, HfSiO4, comparison with zircon and the
 actinide orthosilicates
;
_journal_name_full               'American Mineralogist'
_journal_page_first              804
_journal_page_last               808
_journal_volume                  67
_journal_year                    1982
_chemical_formula_sum            'Hf O4 Si'
_chemical_name_mineral           Hafnon
_space_group_IT_number           141
_symmetry_space_group_name_Hall  '-I 4bd 2'
_symmetry_space_group_name_H-M   'I 41/a m d :2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   6.5725
_cell_length_b                   6.5725
_cell_length_c                   5.9632
_cell_volume                     257.597
_exptl_crystal_density_diffrn    6.977
_[local]_cod_cif_authors_sg_H-M  'I 41/a m d'
_[local]_cod_chemical_formula_sum_orig 'Hf Si O4'
_cod_database_code               9000852
loop_
_symmetry_equiv_pos_as_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_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
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
