data_global
_chemical_name_mineral 'Vinogradovite'
loop_
_publ_author_name
'Rastsvetaeva R K'
'Simonov V I'
'Belov N V'
_journal_name_full 'Soviet Physics Doklady'
_journal_volume 12 
_journal_year 1968
_journal_page_first 1090
_journal_page_last 1092
_publ_section_title
;
 Crystal structure of vinogradovite Na4Ti4[Si2O6]2[Si4O10]O4*nH2O
;
_database_code_amcsd 0019946
_chemical_compound_source 'Kolsk peninsula, Russia'
_chemical_formula_sum 'Na2 Ti2 Si4 O13'
_cell_length_a 5.35
_cell_length_b 8.56
_cell_length_c 24.22
_cell_angle_alpha 90
_cell_angle_beta 101
_cell_angle_gamma 90
_cell_volume 1088.800
_exptl_crystal_density_diffrn      2.819
_symmetry_space_group_name_H-M 'A 1 2/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Na   0.80300   0.19200   0.14900
Ti   0.71100   0.09600   0.34900
Si1   0.27400   0.09000   0.23300
Si2   0.27200   0.10000   0.06500
O1   0.25000   0.16000   0.00000
O2   0.99700   0.04200   0.07900
O3   0.02300   0.01300   0.20800
O4   0.04200   0.06800   0.38500
O5   0.78200   0.24100   0.29200
O6   0.33200   0.08300   0.30000
O7   0.62500   0.25000   0.39400