data_global
_chemical_name_mineral 'Sorensenite'
loop_
_publ_author_name
'Maksimova N V'
'Ilyukhin V V'
'Belov N V'
_journal_name_full 'Soviet Physics Doklady'
_journal_volume 18 
_journal_year 1974
_journal_page_first 681
_journal_page_last 682
_publ_section_title
;
 Crystal structure of sorensenite
;
_database_code_amcsd 0015600
_chemical_formula_sum 'Na4 Sn Be2 Si6 O20 H4'
_cell_length_a 20.78
_cell_length_b 7.45
_cell_length_c 12.05
_cell_angle_alpha 90
_cell_angle_beta 117.1
_cell_angle_gamma 90
_cell_volume 1660.668
_exptl_crystal_density_diffrn      2.885
_symmetry_space_group_name_H-M 'C 1 c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+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
Na1   0.30400   0.22700   0.45200
Na2   0.19800   0.77100   0.05900
Na3   0.51100   0.94800   0.47300
Na4   0.99900   0.04800   0.48700
Sn   0.49980   0.23710   0.24650
Be1   0.24800   0.09300   0.98900
Be2   0.25100   0.40800   0.01000
Si1   0.35340   0.05270   0.23820
Si2   0.14690   0.53660   0.24690
Si3   0.35440   0.44450   0.24500
Si4   0.14530   0.96050   0.25090
Si5   0.13480   0.23880   0.05390
Si6   0.36840   0.76240   0.44540
O1   0.06700   0.95600   0.24400
O2   0.06500   0.56100   0.23400
O3   0.29200   0.96500   0.11000
O4   0.29800   0.52300   0.11900
O5   0.13600   0.08100   0.13400
O6   0.35500   0.93300   0.35200
O7   0.16800   0.74700   0.22000
O8   0.19800   0.25400   0.01400
O9   0.04900   0.73800   0.43800
O10   0.43600   0.44900   0.26100
O11   0.43100   0.03900   0.23700
O12   0.20900   0.47400   0.38100
O13   0.21200   0.03600   0.37500
O14   0.36600   0.57800   0.36700
O15   0.15000   0.43100   0.12700
O16   0.33700   0.24800   0.27000
O17   0.30600   0.25500   0.98800
O18   0.44900   0.25900   0.05800
Wat19   0.07300   0.21200   0.39200
Wat20   0.43800   0.74700   0.09600