data_global
_amcsd_formula_title 'As2 Sn2 Sr'
loop_
_publ_author_name
'Eisenmann B'
'Klein J'
_journal_name_full 'Zeitschrift fur Anorganische und Allgemeine Chemie'
_journal_volume 598 
_journal_year 1991
_journal_page_first 93
_journal_page_last 102
_publ_section_title
;
 Zintl-Phasen mit Schichtanionen: Darstellung und Kristallstrukturender
 isotypen Verbindungen SrSn2As2 und Sr0.87Ba0.13Sn2As2 sowie
 eine Einkristallstrukturbestimmung von KSnSb
 _cod_database_code 1008468
;
_database_code_amcsd 0016372
_chemical_formula_sum 'Sn2 As2 Sr'
_cell_length_a 4.204
_cell_length_b 4.204
_cell_length_c 26.728
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 409.093
_exptl_crystal_density_diffrn      5.783
_symmetry_space_group_name_H-M 'R 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Sn1   0.00000   0.00000   0.00000
Sn2   0.00000   0.00000   0.58310
As1   0.00000   0.00000   0.38480
As2   0.00000   0.00000   0.20000
Sr1   0.00000   0.00000   0.79180
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
Sn1 0.01560 0.01560 0.00360 0.00780 0.00000 0.00000
Sn2 0.00870 0.00870 0.02610 0.00440 0.00000 0.00000
As1 0.00720 0.00720 0.00470 0.00360 0.00000 0.00000
As2 0.01660 0.01660 0.01430 0.00830 0.00000 0.00000
Sr1 0.01620 0.01620 0.01710 0.00810 0.00000 0.00000