data_Tm2CuO4
_audit_creation_method             'Chateigner'

_chemical_name_systematic          'Terbium copper oxide'
_chemical_formula_structural       'Tm2 Cu O4'
_chemical_formula_sum              'Tm2 Cu O4'

_publ_section_title                
;
High pressure synthesis and structural study of R2CuO4 compounds with R=Y,Tb,Dy,Ho,Er,Tm
;
loop_
_publ_author_name                  
  'Bordet P.'
  'Capponi J.J.'
  'Chaillout C.'
  'Chateigner D.'
  'Chenavas J.'
  'Fournier T.'
  'Hodeau JL'
  'Marezio M.'
  'Perroux M.'
  'Thomas G.'
  'Varela A.'
_journal_name_full                 'Physica C'
_journal_volume                    193
_journal_year                      1992
_journal_page_first                178
_journal_page_last                 188

_cell_length_a                     3.83
_cell_length_b                     3.83
_cell_length_c                     11.6
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90

_symmetry_space_group_name_H-M     'I 4/m m m'
_symmetry_cell_setting             tetragonal

loop_
_atom_type_symbol
_atom_type_oxidation_number
  Tm3+   3.000
  Cu2+   2.000
  O2-   -2.000

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
  Tm1   Tm3+   4 e 0. 0. 0.34579
  Cu1   Cu2+   2 a 0. 0. 0
  O1    O2-    8 j 0.091 0.5 0
  O2    O2-    4 d 0 0.5 0.25