data_global
_amcsd_formula_title 'O78 Rb10 Ta29.2'
loop_
_publ_author_name
'Michel C'
'Guyomarch A'
'Raveau B'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 25 
_journal_year 1978
_journal_page_first 251
_journal_page_last 261
_publ_section_title
;
 Nouveaux echangeurs cationiques avec une structure a tunnels
 entrecroises: les niobates et tantalates A10M29.2O78 et
 A10M29.2O78(H2O)10
 _cod_database_code 1001026
;
_database_code_amcsd 0013363
_chemical_formula_sum 'Rb1.667 Ta4.867 O13'
_cell_length_a 7.505
_cell_length_b 7.505
_cell_length_c 36.37
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1774.089
_exptl_crystal_density_diffrn      6.914
_symmetry_space_group_name_H-M 'P 63/m m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  'y,x,-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x,-x+y,-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
  'x-y,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Rb1   0.33333   0.66667   0.91180   1.00000
Rb2   0.29000   0.58000   0.13770   0.33330
Rb3   0.66667   0.33333   0.75000   1.00000
Ta1   0.16660   0.33333   0.03500   1.00000
Ta2   0.00000   0.00000   0.11580   1.00000
Ta3   0.16580   0.33160   0.69530   1.00000
Ta4   0.00000   0.00000   0.75100   0.15000
Ta5   0.33333   0.66667   0.73000   0.15000
O1   0.11100   0.22200   0.08100   1.00000
O2   0.87200   0.74400   0.14700   1.00000
O3   0.44600   0.89200   0.03700   1.00000
O4   0.86800   0.73600   0.02600   1.00000
O5   0.83200   0.66400   0.25000   1.00000
O6   0.46100   0.92200   0.68400   1.00000
O7   0.88500   0.77000   0.70600   1.00000