data_global
_chemical_name_mineral 'Akimotoite'
loop_
_publ_author_name
'Horiuchi H'
'Hirano M'
'Ito E'
'Matsui Y'
_journal_name_full 'American Mineralogist'
_journal_volume 67 
_journal_year 1982
_journal_page_first 788
_journal_page_last 793
_publ_section_title
;
 MgSiO3 (ilmenite-type): Single crystal X-ray diffraction study
;
_database_code_amcsd 0000870
_chemical_formula_sum 'Si Mg O3'
_cell_length_a 4.7284
_cell_length_b 4.7284
_cell_length_c 13.5591
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 262.537
_exptl_crystal_density_diffrn      3.810
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si   0.00000   0.00000   0.15768
Mg   0.00000   0.00000   0.35970
O   0.32140   0.03610   0.24077
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
Si 0.00535 0.00535 0.00531 0.00268 0.00000 0.00000
Mg 0.00849 0.00849 0.00550 0.00425 0.00000 0.00000
O 0.00578 0.00510 0.00745 0.00289 -0.00028 0.00028