data_global
_chemical_name_mineral 'Chukochenite'
loop_
_publ_author_name
'Rao C'
'Gu X'
'Wang R'
'Xia Q'
'Cai Y'
'Dong C'
'Hatert F'
'Hao Y'
_journal_name_full 'American Mineralogist'
_journal_volume 107 
_journal_year 2022
_journal_page_first 842
_journal_page_last 847
_publ_section_title
;
 Chukochenite, (Li0.5Al0.5)Al2O4, a new lithium oxyspinel mineral from
 the Xianghualing skarn, Hunan Province, China
;
_database_code_amcsd 0021063
_chemical_compound_source 'Xianghualing skarn, Hunan Province, China'
_chemical_formula_sum 'Li.298 Al2.431 Fe.272 O4'
_cell_length_a 5.6593
_cell_length_b 16.8981
_cell_length_c 7.9938
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 764.458
_exptl_crystal_density_diffrn      3.827
_symmetry_space_group_name_H-M 'I m m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,1/2-y,z'
  '1/2+x,-y,1/2+z'
  '-x,1/2+y,-z'
  '1/2-x,+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  'x,1/2+y,-z'
  '1/2+x,+y,1/2-z'
  '-x,1/2-y,z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Li1   0.50000   0.50000   0.50000   0.66500   0.01260
Al1   0.50000   0.50000   0.50000   0.33500   0.01260
Al2   0.50000   0.41673   0.12054   0.87200   0.00740
Fe2   0.50000   0.41673   0.12054   0.12800   0.00740
Al1   0.75000   0.58037   0.25000   0.97100   0.00630
Li1   0.75000   0.58037   0.25000   0.02900   0.00630
Al3   0.25000   0.25000   0.25000   0.92400   0.00700
Li3   0.25000   0.25000   0.25000   0.07600   0.00700
Fe4   0.00000   0.25000   0.62634   0.55900   0.00710
Al4   0.00000   0.25000   0.62634   0.44100   0.00710
Al5   0.50000   0.66442   0.50182   0.95300   0.00670
Li5   0.50000   0.66442   0.50182   0.04700   0.00670
O1   0.50000   0.50497   0.24500   1.00000   0.00860
O2   0.22240   0.25000   0.01530   1.00000   0.01000
O3   0.23920   0.41266  -0.00910   1.00000   0.00900
O4   0.50000   0.65726   0.26460   1.00000   0.00930
O5   0.50000   0.32892   0.25400   1.00000   0.00740
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
Li1 0.00540 0.01640 0.01590 0.00000 0.00000 0.00290
Al1 0.00540 0.01640 0.01590 0.00000 0.00000 0.00290
Al2 0.00830 0.00660 0.00710 0.00000 0.00000 -0.00011
Fe2 0.00830 0.00660 0.00710 0.00000 0.00000 -0.00011
Al1 0.00570 0.00620 0.00700 0.00000 0.00150 0.00000
Li1 0.00570 0.00620 0.00700 0.00000 0.00150 0.00000
Al3 0.00800 0.00560 0.00740 0.00000 -0.00180 0.00000
Li3 0.00800 0.00560 0.00740 0.00000 -0.00180 0.00000
Fe4 0.00830 0.00620 0.00690 0.00000 0.00000 0.00000
Al4 0.00830 0.00620 0.00690 0.00000 0.00000 0.00000
Al5 0.00380 0.00740 0.00890 0.00000 0.00000 -0.00130
Li5 0.00380 0.00740 0.00890 0.00000 0.00000 -0.00130
O1 0.00540 0.00560 0.01470 0.00000 0.00000 0.00180
O2 0.00840 0.00970 0.01210 0.00000 -0.00320 0.00000
O3 0.00680 0.01210 0.00810 -0.00250 0.00090 0.00010
O4 0.00560 0.00920 0.01300 0.00000 0.00000 -0.00450
O5 0.00670 0.00520 0.01040 0.00000 0.00000 -0.00090