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
 Reported formula: (Ce1.85 La1.11 Nd.53 Pr.15 Sm.04 Gd.03 Ca.32 Th.02)
 (Fe2+.85 Mn2+.04 Zr.03 Y.03 Ca.05) (Ti2.54 Fe3+1.19 Nb.15) Si4.06 O22
 Crystal (2)
;
_database_code_amcsd 0005957
_chemical_compound_source 'Mongolia'
_chemical_formula_sum 'Ce4 Fe3 Ti2 Si4 O22'
_cell_length_a 13.534
_cell_length_b 5.789
_cell_length_c 11.159
_cell_angle_alpha 90
_cell_angle_beta 100.57
_cell_angle_gamma 90
_cell_volume 859.454
_exptl_crystal_density_diffrn      4.977
_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   0.35496   0.00000   0.73642   0.02830
CeA2   0.06918   0.00000   0.74232   0.03160
Fe2+M1   0.50000   0.00000   0.50000   0.03470
Fe3+M2   0.25000   0.25000   0.00000   0.02310
TiM3   0.00000   0.00000   0.00000   0.02090
TiM4   0.50000   0.00000   0.00000   0.02660
Si1   0.20200   0.50000   0.73170   0.03700
Si2   0.35760   0.50000   0.54700   0.04160
O1   0.47760   0.25320   0.87440   0.02230
O2   0.14680   0.00000   0.97860   0.02000
O3   0.18270   0.00000   0.59570   0.02500
O4   0.34860   0.00000   0.98860   0.02100
O5   0.42470   0.27300   0.59850   0.03700
O6   0.22860  -0.73540   0.81380   0.01930
O7   0.08310   0.50000   0.67370   0.05200
O8   0.26540   0.50000   0.62540   0.05300
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 0.03040 0.02480 0.03080 0.00000 0.00860 0.00000
CeA2 0.02420 0.04620 0.02540 0.00000 0.00730 0.00000
Fe2+M1 0.05300 0.02860 0.02340 0.00000 0.00950 0.00000
Fe3+M2 0.02840 0.02040 0.02060 0.00030 0.00450 0.00050
TiM3 0.02400 0.01900 0.02220 0.00000 0.00850 0.00000
TiM4 0.03010 0.02150 0.02770 0.00000 0.00410 0.00000
Si1 0.04100 0.03030 0.04000 0.00000 0.00880 0.00000
Si2 0.04600 0.04100 0.03800 0.00000 0.00930 0.00000
O1 0.02300 0.02600 0.02000 -0.00500 0.00780 -0.00600
O2 0.02100 0.01700 0.02300 0.00000 0.00600 0.00000
O3 0.03600 0.01900 0.01900 0.00000 0.00800 0.00000
O4 0.02400 0.01900 0.01900 0.00000 0.00500 0.00000
O5 0.04000 0.03700 0.03100 0.00300 -0.00500 0.01720
O6 0.03600 0.01000 0.01200 0.00000 0.00400 0.00300
O7 0.01600 0.08300 0.05300 0.00000 -0.00400 0.00000
O8 0.04400 0.08300 0.03900 0.00000 0.03000 0.00000