data_global
_chemical_name_mineral 'Chevkinite-(Ce)'
loop_
_publ_author_name
'Sokolova E V'
'Hawthorne F C'
'Della Ventura G'
'Kartashov P M'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 42 
_journal_year 2004
_journal_page_first 1013
_journal_page_last 1025
_publ_section_title
;
 Chevkinite-(Ce): Crystal structure and the effect of moderate radiation-induced
 damage on site-occupancy refinement
 Crystal (1)
;
_database_code_amcsd 0005956
_chemical_compound_source 'Mongolia'
_chemical_formula_sum 'Ce4 Fe3 Ti2 Si4 O22'
_cell_length_a 13.4319
_cell_length_b 5.7628
_cell_length_c 11.0914
_cell_angle_alpha 90
_cell_angle_beta 100.629
_cell_angle_gamma 90
_cell_volume 843.803
_exptl_crystal_density_diffrn      5.070
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
CeA1   0.35601   0.00000   0.73503   0.01810
CeA2   0.06863   0.00000   0.74067   0.02190
Fe2+M1   0.50000   0.00000   0.50000   0.02170
Fe3+M2   0.25000   0.25000   0.00000   0.01510
TiM3   0.00000   0.00000   0.00000   0.01390
TiM4   0.50000   0.00000   0.00000   0.01750
Si1   0.20080   0.50000   0.73120   0.02930
Si2   0.35670   0.50000   0.54650   0.03200
O1   0.47750   0.25390   0.87340   0.01490
O2   0.14600   0.00000   0.97670   0.01210
O3   0.18430   0.00000   0.59690   0.01540
O4   0.34790   0.00000   0.98950   0.01220
O5   0.42450   0.27390   0.59730   0.02350
O6   0.22850  -0.73490   0.81390   0.01510
O7   0.08180   0.50000   0.67260   0.03300
O8   0.26480   0.50000   0.62370   0.04000
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
CeA1 0.01800 0.01810 0.01820 0.00000 0.00360 0.00000
CeA2 0.01460 0.03660 0.01500 0.00000 0.00370 0.00000
Fe2+M1 0.03280 0.01880 0.01370 0.00000 0.00490 0.00000
Fe3+M2 0.01750 0.01450 0.01300 -0.00020 0.00220 0.00050
TiM3 0.01420 0.01550 0.01260 0.00000 0.00450 0.00000
TiM4 0.01840 0.01660 0.01710 0.00000 0.00230 0.00000
Si1 0.03180 0.02720 0.02940 0.00000 0.00670 0.00000
Si2 0.03440 0.03190 0.03000 0.00000 0.00690 0.00000
O1 0.01500 0.01600 0.01400 -0.00300 0.00400 -0.00400
O2 0.01300 0.01200 0.01300 0.00000 0.00600 0.00000
O3 0.02100 0.01500 0.01000 0.00000 0.00300 0.00000
O4 0.01200 0.01000 0.01500 0.00000 0.00300 0.00000
O5 0.03000 0.01900 0.01900 0.00200 -0.00300 0.01100
O6 0.02700 0.01000 0.00900 0.00200 0.00200 0.00300
O7 0.01000 0.06000 0.02700 0.00000 -0.00100 0.00000
O8 0.03300 0.06800 0.02400 0.00000 0.02300 0.00000