data_global
_chemical_name_mineral 'Keldyshite'
loop_
_publ_author_name
'Khalikov A D'
'Khomyakov A P'
'Makhmudov S A'
_journal_name_full 'Doklady Akademii Nauk SSSR'
_journal_volume 238 
_journal_year 1978
_journal_page_first 573
_journal_page_last 575
_publ_section_title
;
 Crystal structure of keldyshite NaZr[Si2O6OH]
;
_database_code_amcsd 0012457
_chemical_formula_sum 'Na Zr Si2 O7'
_cell_length_a 9.00
_cell_length_b 5.34
_cell_length_c 6.96
_cell_angle_alpha 92
_cell_angle_beta 116
_cell_angle_gamma 88
_cell_volume 300.390
_exptl_crystal_density_diffrn      3.122
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.56400   0.23900   0.38900   0.03268
Zr   0.27600   0.77400   0.05700   0.01773
Si1   0.70500   0.71700   0.24600   0.01267
Si2   0.83300   0.74500   0.70900   0.01381
O1   0.75000   0.02900   0.68800   0.02444
O2   0.51900   0.81400   0.22700   0.00925
O3   0.30500   0.57200   0.84600   0.02938
O4   0.00400   0.68400   0.91500   0.01494
O5   0.22800   0.08900   0.91000   0.01292
O6   0.29500   0.46900   0.21100   0.01317
O7   0.85000   0.70000   0.48200   0.03014