data_9006645
_chemical_name '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: P = 9.220 GPa
;
_chemical_formula_sum 'Cr2 Si O4'
_cell_length_a 5.6374
_cell_length_b 11.0375
_cell_length_c 9.1192
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 567.422
_symmetry_space_group_name_H-M 'F d d d'
loop_
_symmetry_equiv_pos_as_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_Uiso_or_equiv
Cr   0.12500   0.12500   0.48168   0.01039
Si   0.12500   0.12500   0.12500   0.00899
O  -0.04170   0.04940   0.23560   0.01191