data_global
_chemical_name_mineral 'Nioboaeschynite-(Ce)'
loop_
_publ_author_name
'Aleksandrov V B'
_journal_name_full 'Doklady Akademii Nauk SSSR'
_journal_volume 142 
_journal_year 1962
_journal_page_first 181
_journal_page_last 184
_publ_section_title
;
 The crystal structure of aeschynite
;
_database_code_amcsd 0012439
_chemical_compound_source 'Vishnevye Mts, Chelyabinsk Oblast, Southern Urals, Russia'
_chemical_formula_sum 'Ce.68 Ca.17 Fe.06 Mn.02 Th.01 (Nb1.01 Ti.99) O6'
_cell_length_a 5.37
_cell_length_b 11.08
_cell_length_c 7.56
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 449.817
_exptl_crystal_density_diffrn      5.111
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Ce   0.04200   0.45800   0.25000   0.68000
Ca   0.04200   0.45800   0.25000   0.17000
Fe   0.04200   0.45800   0.25000   0.06000
Mn   0.04200   0.45800   0.25000   0.02000
Th   0.04200   0.45800   0.25000   0.01000
Nb   0.04000   0.14400   0.00800   0.50500
Ti   0.04000   0.14400   0.00800   0.49500
O1   0.37800   0.21000   0.56700   1.00000
O2   0.26400   0.47700   0.53800   1.00000
O3   0.16700   0.10500   0.25000   1.00000
O4   0.37500   0.35500   0.25000   1.00000