data_global
_chemical_name_mineral 'Khibinskite'
loop_
_publ_author_name
'Chernov A N'
'Maksimov B A'
'Ilyukhin V V'
'Belov N V'
_journal_name_full 'Soviet Physics Doklady'
_journal_volume 15 
_journal_year 1971
_journal_page_first 711
_journal_page_last 713
_publ_section_title
;
 Crystalline structure of monoclinic modification of K,Zr-diorthosilicate
 (K2ZrSi2O7)
;
_database_code_amcsd 0015597
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'K2 Zr Si2 O7'
_cell_length_a 9.54
_cell_length_b 14.26
_cell_length_c 5.60
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 116.517
_cell_volume 681.684
_exptl_crystal_density_diffrn      3.289
_symmetry_space_group_name_H-M 'P 1 1 21/b'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2-z'
  '-x,1/2-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K1   0.03500   0.42600   0.26400
K2   0.48200   0.59200   0.26000
Zr   0.23700   0.23200   0.25300
Si1   0.17200   0.36900   0.74400
Si2   0.33600   0.11400   0.74100
O1   0.00400   0.62900   0.26400
O2   0.30900   0.49200   0.79500
O3   0.47600   0.31600   0.23200
O4   0.21700   0.34200   0.46400
O5   0.18500   0.29600   0.93500
O6   0.24500   0.11100   0.00700
O7   0.26500   0.14800   0.54000