data_global
_amcsd_formula_title 'Cr2SiO4'
loop_
_publ_author_name
'Miletich R'
'Nowak M'
'Seifert F'
'Angel R J'
'Brandstatter G'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 26 
_journal_year 1999
_journal_page_first 446
_journal_page_last 459
_publ_section_title
;
 High-pressure crystal chemistry of chromous orthosilicate, Cr2SiO4.
 A single-crystal X-ray diffraction and electronic absorption
 spectroscopy study
 Sample in air: P = 0.0001 GPa
;
_database_code_amcsd 0008222
_chemical_formula_sum 'Cr2 Si O4'
_cell_length_a 5.7005
_cell_length_b 11.1651
_cell_length_c 9.5847
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 610.034
_exptl_crystal_density_diffrn      4.270
_symmetry_space_group_name_H-M 'F d d d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  '3/4+x,-y,3/4+z'
  '3/4+x,1/2-y,1/4+z'
  '1/4+x,-y,1/4+z'
  '1/4+x,1/2-y,3/4+z'
  '3/4-x,y,3/4-z'
  '3/4-x,1/2+y,1/4-z'
  '1/4-x,y,1/4-z'
  '1/4-x,1/2+y,3/4-z'
  '-x,3/4+y,3/4+z'
  '-x,1/4+y,1/4+z'
  '1/2-x,3/4+y,1/4+z'
  '1/2-x,1/4+y,3/4+z'
  'x,3/4-y,3/4-z'
  'x,1/4-y,1/4-z'
  '1/2+x,3/4-y,1/4-z'
  '1/2+x,1/4-y,3/4-z'
  '3/4+x,3/4+y,-z'
  '3/4+x,1/4+y,1/2-z'
  '1/4+x,3/4+y,1/2-z'
  '1/4+x,1/4+y,-z'
  '3/4-x,3/4-y,z'
  '3/4-x,1/4-y,1/2+z'
  '1/4-x,3/4-y,1/2+z'
  '1/4-x,1/4-y,z'
  '-x,-y,-z'
  '-x,1/2-y,1/2-z'
  '1/2-x,-y,1/2-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
Cr   0.12500   0.12500   0.48166   0.01178
Si   0.12500   0.12500   0.12500   0.00925
O  -0.04364   0.04919   0.22985   0.01203
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
Cr 0.00942 0.00865 0.01731 0.00048 0.00000 0.00000
Si 0.00831 0.00815 0.01117 0.00000 0.00000 0.00000
O 0.01037 0.01074 0.01489 -0.00116 0.00161 0.00136