data_global
_amcsd_formula_title 'Cr Cu4 O19.9 Sr8 Tl3'
loop_
_publ_author_name
'Michel C'
'Letouze F'
'Martin C'
'Hervieu M'
'Raveau B'
_journal_name_full 'Physica C'
_journal_volume 262 
_journal_year 1996
_journal_page_first 159
_journal_page_last 167
_publ_section_title
;
 Neutron diffraction structure determination of the superconducting
 copper oxychromate Tl3 (Cr O4) Sr8 Cu4 O16
 _cod_database_code 1001761
;
_database_code_amcsd 0015077
_chemical_formula_sum 'Tl3 Cr Cu4 Sr8 O19.9'
_cell_length_a 3.7803
_cell_length_b 15.2573
_cell_length_c 17.67369
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1019.369
_exptl_crystal_density_diffrn      6.316
_symmetry_space_group_name_H-M 'A 2 m m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  'x,y,-z'
  'x,1/2+y,1/2-z'
  'x,-y,z'
  '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
_atom_site_occupancy
Tl1   0.00000   0.22180   0.00000   1.00000
Tl2   0.00000   0.00000   0.00000   1.00000
Cr1   0.00000   0.45900   0.00000   0.50000
Cu1   0.00000   0.00000   0.26020   1.00000
Cu2   0.00000   0.25000   0.25000   1.00000
Sr1   0.50000   0.12240   0.15180   1.00000
Sr2   0.50000   0.36580   0.14720   1.00000
O1   0.50000   0.00000   0.26020   1.00000
O2   0.50000   0.25000   0.25000   0.95000
O3   0.00000   0.12500   0.25820   1.00000
O4   0.00000   0.00000   0.11280   1.00000
O5   0.00000   0.00000   0.41830   1.00000
O6   0.00000   0.24750   0.11140   1.00000
O7   0.50000   0.11800   0.00000   1.00000
O8   0.35400   0.39100   0.00000   0.50000
O9   0.64600   0.39100   0.00000   0.50000