data_global
_amcsd_formula_title 'As2 Cs2 Si'
loop_
_publ_author_name
'Eisenmann B'
'Klein J'
_journal_name_full 'Journal of the Less-Common Metals'
_journal_volume 175 
_journal_year 1991
_journal_page_first 109
_journal_page_last 117
_publ_section_title
;
 SiS2-isostrukturelle Anionen (SiP2^2-^),(GeAs2^2-^) und
 (SnAs2^2-^) in Alkaliverbindungen
 _cod_database_code 1008523
;
_database_code_amcsd 0016416
_chemical_formula_sum 'Cs2 Si As2'
_cell_length_a 14.425
_cell_length_b 7.571
_cell_length_c 6.420
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 701.139
_exptl_crystal_density_diffrn      4.204
_symmetry_space_group_name_H-M 'I b a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-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_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cs1   0.35290   0.33560   0.00000
Si1   0.50000   0.00000   0.25000
As1   0.09100   0.34580   0.00000
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
Cs1 0.02740 0.02750 0.02830 0.00670 0.00000 0.00000
Si1 0.02160 0.02130 0.00660 0.00000 0.00000 0.00000
As1 0.02060 0.02150 0.01830 0.00840 0.00000 0.00000