 
data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Wyckoff R W G'
_journal_name_full 'Crystal Structures'
_journal_volume 1 
_journal_year 1963
_journal_page_first 7
_journal_page_last 83
_publ_section_title
;
 Second edition. Interscience Publishers, New York, New York
 Cubic closest packed, ccp, structure
;
_database_code_amcsd 0011144
_chemical_formula_sum 'Cr'
_cell_length_a 3.68
_cell_length_b 3.68
_cell_length_c 3.68
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 49.836
_exptl_crystal_density_diffrn      6.930
_symmetry_space_group_name_H-M 'F m 3 m'
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'
  'z,-x,y'
  'z,1/2-x,1/2+y'
  '1/2+z,-x,1/2+y'
  '1/2+z,1/2-x,y'
  '-y,z,-x'
  '-y,1/2+z,1/2-x'
  '1/2-y,z,1/2-x'
  '1/2-y,1/2+z,-x'
  'x,-y,z'
  'x,1/2-y,1/2+z'
  '1/2+x,-y,1/2+z'
  '1/2+x,1/2-y,z'
  '-z,x,-y'
  '-z,1/2+x,1/2-y'
  '1/2-z,x,1/2-y'
  '1/2-z,1/2+x,-y'
  'y,-z,x'
  'y,1/2-z,1/2+x'
  '1/2+y,-z,1/2+x'
  '1/2+y,1/2-z,x'
  '-x,y,-z'
  '-x,1/2+y,1/2-z'
  '1/2-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  'x,-z,-y'
  'x,1/2-z,1/2-y'
  '1/2+x,-z,1/2-y'
  '1/2+x,1/2-z,-y'
  '-z,y,x'
  '-z,1/2+y,1/2+x'
  '1/2-z,y,1/2+x'
  '1/2-z,1/2+y,x'
  'y,-x,-z'
  'y,1/2-x,1/2-z'
  '1/2+y,-x,1/2-z'
  '1/2+y,1/2-x,-z'
  '-x,z,y'
  '-x,1/2+z,1/2+y'
  '1/2-x,z,1/2+y'
  '1/2-x,1/2+z,y'
  'z,-y,-x'
  'z,1/2-y,1/2-x'
  '1/2+z,-y,1/2-x'
  '1/2+z,1/2-y,-x'
  '-y,x,z'
  '-y,1/2+x,1/2+z'
  '1/2-y,x,1/2+z'
  '1/2-y,1/2+x,z'
  'x,z,y'
  'x,1/2+z,1/2+y'
  '1/2+x,z,1/2+y'
  '1/2+x,1/2+z,y'
  '-z,-y,-x'
  '-z,1/2-y,1/2-x'
  '1/2-z,-y,1/2-x'
  '1/2-z,1/2-y,-x'
  'y,x,z'
  'y,1/2+x,1/2+z'
  '1/2+y,x,1/2+z'
  '1/2+y,1/2+x,z'
  '-x,-z,-y'
  '-x,1/2-z,1/2-y'
  '1/2-x,-z,1/2-y'
  '1/2-x,1/2-z,-y'
  'z,y,x'
  'z,1/2+y,1/2+x'
  '1/2+z,y,1/2+x'
  '1/2+z,1/2+y,x'
  '-y,-x,-z'
  '-y,1/2-x,1/2-z'
  '1/2-y,-x,1/2-z'
  '1/2-y,1/2-x,-z'
  'z,x,-y'
  'z,1/2+x,1/2-y'
  '1/2+z,x,1/2-y'
  '1/2+z,1/2+x,-y'
  '-y,-z,x'
  '-y,1/2-z,1/2+x'
  '1/2-y,-z,1/2+x'
  '1/2-y,1/2-z,x'
  'x,y,-z'
  'x,1/2+y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2+x,1/2+y,-z'
  '-z,-x,y'
  '-z,1/2-x,1/2+y'
  '1/2-z,-x,1/2+y'
  '1/2-z,1/2-x,y'
  'y,z,-x'
  'y,1/2+z,1/2-x'
  '1/2+y,z,1/2-x'
  '1/2+y,1/2+z,-x'
  '-x,-y,z'
  '-x,1/2-y,1/2+z'
  '1/2-x,-y,1/2+z'
  '1/2-x,1/2-y,z'
  '-z,x,y'
  '-z,1/2+x,1/2+y'
  '1/2-z,x,1/2+y'
  '1/2-z,1/2+x,y'
  'y,-z,-x'
  'y,1/2-z,1/2-x'
  '1/2+y,-z,1/2-x'
  '1/2+y,1/2-z,-x'
  '-x,y,z'
  '-x,1/2+y,1/2+z'
  '1/2-x,y,1/2+z'
  '1/2-x,1/2+y,z'
  'z,-x,-y'
  'z,1/2-x,1/2-y'
  '1/2+z,-x,1/2-y'
  '1/2+z,1/2-x,-y'
  '-y,z,x'
  '-y,1/2+z,1/2+x'
  '1/2-y,z,1/2+x'
  '1/2-y,1/2+z,x'
  'x,-y,-z'
  'x,1/2-y,1/2-z'
  '1/2+x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '-x,z,-y'
  '-x,1/2+z,1/2-y'
  '1/2-x,z,1/2-y'
  '1/2-x,1/2+z,-y'
  'z,-y,x'
  'z,1/2-y,1/2+x'
  '1/2+z,-y,1/2+x'
  '1/2+z,1/2-y,x'
  '-y,x,-z'
  '-y,1/2+x,1/2-z'
  '1/2-y,x,1/2-z'
  '1/2-y,1/2+x,-z'
  'x,-z,y'
  'x,1/2-z,1/2+y'
  '1/2+x,-z,1/2+y'
  '1/2+x,1/2-z,y'
  '-z,y,-x'
  '-z,1/2+y,1/2-x'
  '1/2-z,y,1/2-x'
  '1/2-z,1/2+y,-x'
  'y,-x,z'
  'y,1/2-x,1/2+z'
  '1/2+y,-x,1/2+z'
  '1/2+y,1/2-x,z'
  '-x,-z,y'
  '-x,1/2-z,1/2+y'
  '1/2-x,-z,1/2+y'
  '1/2-x,1/2-z,y'
  'z,y,-x'
  'z,1/2+y,1/2-x'
  '1/2+z,y,1/2-x'
  '1/2+z,1/2+y,-x'
  '-y,-x,z'
  '-y,1/2-x,1/2+z'
  '1/2-y,-x,1/2+z'
  '1/2-y,1/2-x,z'
  'x,z,-y'
  'x,1/2+z,1/2-y'
  '1/2+x,z,1/2-y'
  '1/2+x,1/2+z,-y'
  '-z,-y,x'
  '-z,1/2-y,1/2+x'
  '1/2-z,-y,1/2+x'
  '1/2-z,1/2-y,x'
  'y,x,-z'
  'y,1/2+x,1/2-z'
  '1/2+y,x,1/2-z'
  '1/2+y,1/2+x,-z'
  '-z,-x,-y'
  '-z,1/2-x,1/2-y'
  '1/2-z,-x,1/2-y'
  '1/2-z,1/2-x,-y'
  'y,z,x'
  'y,1/2+z,1/2+x'
  '1/2+y,z,1/2+x'
  '1/2+y,1/2+z,x'
  '-x,-y,-z'
  '-x,1/2-y,1/2-z'
  '1/2-x,-y,1/2-z'
  '1/2-x,1/2-y,-z'
  'z,x,y'
  'z,1/2+x,1/2+y'
  '1/2+z,x,1/2+y'
  '1/2+z,1/2+x,y'
  '-y,-z,-x'
  '-y,1/2-z,1/2-x'
  '1/2-y,-z,1/2-x'
  '1/2-y,1/2-z,-x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr   0.00000   0.00000   0.00000

data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Wyckoff R W G'
_journal_name_full 'Crystal Structures'
_journal_volume 1 
_journal_year 1963
_journal_page_first 7
_journal_page_last 83
_publ_section_title
;
 Second edition. Interscience Publishers, New York, New York
 Hexagonal closest packed, hcp, structure
;
_database_code_amcsd 0011170
_chemical_formula_sum 'Cr'
_cell_length_a 2.722
_cell_length_b 2.722
_cell_length_c 4.427
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 28.406
_exptl_crystal_density_diffrn      6.079
_symmetry_space_group_name_H-M 'P 63/m m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  'y,x,-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x,-x+y,-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
  'x-y,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr   0.33333   0.66667   0.25000

data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Wyckoff R W G'
_journal_name_full 'Crystal Structures'
_journal_volume 1 
_journal_year 1963
_journal_page_first 7
_journal_page_last 83
_publ_section_title
;
 Second edition. Interscience Publishers, New York, New York
 Body centered cubic, bcc, structure
;
_database_code_amcsd 0011209
_chemical_formula_sum 'Cr'
_cell_length_a 2.8839
_cell_length_b 2.8839
_cell_length_c 2.8839
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 23.985
_exptl_crystal_density_diffrn      7.200
_symmetry_space_group_name_H-M 'I m 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'z,-x,y'
  '1/2+z,1/2-x,1/2+y'
  '-y,z,-x'
  '1/2-y,1/2+z,1/2-x'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-z,x,-y'
  '1/2-z,1/2+x,1/2-y'
  'y,-z,x'
  '1/2+y,1/2-z,1/2+x'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  'x,-z,-y'
  '1/2+x,1/2-z,1/2-y'
  '-z,y,x'
  '1/2-z,1/2+y,1/2+x'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,z,y'
  '1/2-x,1/2+z,1/2+y'
  'z,-y,-x'
  '1/2+z,1/2-y,1/2-x'
  '-y,x,z'
  '1/2-y,1/2+x,1/2+z'
  'x,z,y'
  '1/2+x,1/2+z,1/2+y'
  '-z,-y,-x'
  '1/2-z,1/2-y,1/2-x'
  'y,x,z'
  '1/2+y,1/2+x,1/2+z'
  '-x,-z,-y'
  '1/2-x,1/2-z,1/2-y'
  'z,y,x'
  '1/2+z,1/2+y,1/2+x'
  '-y,-x,-z'
  '1/2-y,1/2-x,1/2-z'
  'z,x,-y'
  '1/2+z,1/2+x,1/2-y'
  '-y,-z,x'
  '1/2-y,1/2-z,1/2+x'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-z,-x,y'
  '1/2-z,1/2-x,1/2+y'
  'y,z,-x'
  '1/2+y,1/2+z,1/2-x'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '-z,x,y'
  '1/2-z,1/2+x,1/2+y'
  'y,-z,-x'
  '1/2+y,1/2-z,1/2-x'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'z,-x,-y'
  '1/2+z,1/2-x,1/2-y'
  '-y,z,x'
  '1/2-y,1/2+z,1/2+x'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  '-x,z,-y'
  '1/2-x,1/2+z,1/2-y'
  'z,-y,x'
  '1/2+z,1/2-y,1/2+x'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,-z,y'
  '1/2+x,1/2-z,1/2+y'
  '-z,y,-x'
  '1/2-z,1/2+y,1/2-x'
  'y,-x,z'
  '1/2+y,1/2-x,1/2+z'
  '-x,-z,y'
  '1/2-x,1/2-z,1/2+y'
  'z,y,-x'
  '1/2+z,1/2+y,1/2-x'
  '-y,-x,z'
  '1/2-y,1/2-x,1/2+z'
  'x,z,-y'
  '1/2+x,1/2+z,1/2-y'
  '-z,-y,x'
  '1/2-z,1/2-y,1/2+x'
  'y,x,-z'
  '1/2+y,1/2+x,1/2-z'
  '-z,-x,-y'
  '1/2-z,1/2-x,1/2-y'
  'y,z,x'
  '1/2+y,1/2+z,1/2+x'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
  'z,x,y'
  '1/2+z,1/2+x,1/2+y'
  '-y,-z,-x'
  '1/2-y,1/2-z,1/2-x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr   0.00000   0.00000   0.00000

data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Kimoto K'
'Nishida I'
_journal_name_full 'Journal of the Physical Society of Japan'
_journal_volume 22 
_journal_year 1967
_journal_page_first 744
_journal_page_last 756
_publ_section_title
;
 An electron diffraction study on the crystal structure of
 a new modification of chromium
;
_database_code_amcsd 0014168
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Cr4'
_cell_length_a 4.588
_cell_length_b 4.588
_cell_length_c 4.588
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 96.576
_exptl_crystal_density_diffrn      7.152
_symmetry_space_group_name_H-M 'P m 3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'z,x,-y'
  'z,-x,y'
  '-z,x,y'
  '-z,-x,-y'
  'y,-z,-x'
  '-y,-z,x'
  '-y,z,-x'
  'y,z,x'
  'x,-y,z'
  '-x,y,z'
  'x,y,-z'
  '-x,-y,-z'
  '-z,-x,y'
  '-z,x,-y'
  'z,-x,-y'
  'z,x,y'
  '-y,z,x'
  'y,z,-x'
  'y,-z,x'
  '-y,-z,-x'
  '-x,y,-z'
  'x,-y,-z'
  '-x,-y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Cr1   0.00000   0.00000   0.00000   1.00000
Cr2   0.50000   0.50000   0.50000   1.00000
Cr3   0.24800   0.04000   0.51000   0.25000

data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Bradley A J'
'Ollard E F'
_journal_name_full 'Nature'
_journal_volume 117 
_journal_year 1926
_journal_page_first 122
_journal_page_last 122
_publ_section_title
;
 Allotropy of chromium
;
_database_code_amcsd 0014671
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Cr'
_cell_length_a 2.714
_cell_length_b 2.714
_cell_length_c 4.410
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 28.131
_exptl_crystal_density_diffrn      6.138
_symmetry_space_group_name_H-M 'P 63/m m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x,x-y,1/2-z'
  '-x+y,-x,1/2-z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  'y,x,-z'
  'y,-x+y,-z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x+y,y,1/2-z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x,-x+y,-z'
  'x-y,x,-z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x-y,1/2-z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
  'x-y,-y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr   0.33333   0.66667   0.25000

data_global
_chemical_name_mineral 'Chromium'
loop_
_publ_author_name
'Hull A W'
'Davey W P'
_journal_name_full 'Physical Review'
_journal_volume 14 
_journal_year 1919
_journal_page_first 540
_journal_page_last 540
_publ_section_title
;
 Crystal structure of chromium
;
_database_code_amcsd 0015114
_chemical_formula_sum 'Cr'
_cell_length_a 2.91
_cell_length_b 2.91
_cell_length_c 2.91
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 24.642
_exptl_crystal_density_diffrn      7.008
_symmetry_space_group_name_H-M 'I m 3 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'z,-x,y'
  '1/2+z,1/2-x,1/2+y'
  '-y,z,-x'
  '1/2-y,1/2+z,1/2-x'
  'x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '-z,x,-y'
  '1/2-z,1/2+x,1/2-y'
  'y,-z,x'
  '1/2+y,1/2-z,1/2+x'
  '-x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  'x,-z,-y'
  '1/2+x,1/2-z,1/2-y'
  '-z,y,x'
  '1/2-z,1/2+y,1/2+x'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,z,y'
  '1/2-x,1/2+z,1/2+y'
  'z,-y,-x'
  '1/2+z,1/2-y,1/2-x'
  '-y,x,z'
  '1/2-y,1/2+x,1/2+z'
  'x,z,y'
  '1/2+x,1/2+z,1/2+y'
  '-z,-y,-x'
  '1/2-z,1/2-y,1/2-x'
  'y,x,z'
  '1/2+y,1/2+x,1/2+z'
  '-x,-z,-y'
  '1/2-x,1/2-z,1/2-y'
  'z,y,x'
  '1/2+z,1/2+y,1/2+x'
  '-y,-x,-z'
  '1/2-y,1/2-x,1/2-z'
  'z,x,-y'
  '1/2+z,1/2+x,1/2-y'
  '-y,-z,x'
  '1/2-y,1/2-z,1/2+x'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-z,-x,y'
  '1/2-z,1/2-x,1/2+y'
  'y,z,-x'
  '1/2+y,1/2+z,1/2-x'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '-z,x,y'
  '1/2-z,1/2+x,1/2+y'
  'y,-z,-x'
  '1/2+y,1/2-z,1/2-x'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'z,-x,-y'
  '1/2+z,1/2-x,1/2-y'
  '-y,z,x'
  '1/2-y,1/2+z,1/2+x'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  '-x,z,-y'
  '1/2-x,1/2+z,1/2-y'
  'z,-y,x'
  '1/2+z,1/2-y,1/2+x'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,-z,y'
  '1/2+x,1/2-z,1/2+y'
  '-z,y,-x'
  '1/2-z,1/2+y,1/2-x'
  'y,-x,z'
  '1/2+y,1/2-x,1/2+z'
  '-x,-z,y'
  '1/2-x,1/2-z,1/2+y'
  'z,y,-x'
  '1/2+z,1/2+y,1/2-x'
  '-y,-x,z'
  '1/2-y,1/2-x,1/2+z'
  'x,z,-y'
  '1/2+x,1/2+z,1/2-y'
  '-z,-y,x'
  '1/2-z,1/2-y,1/2+x'
  'y,x,-z'
  '1/2+y,1/2+x,1/2-z'
  '-z,-x,-y'
  '1/2-z,1/2-x,1/2-y'
  'y,z,x'
  '1/2+y,1/2+z,1/2+x'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
  'z,x,y'
  '1/2+z,1/2+x,1/2+y'
  '-y,-z,-x'
  '1/2-y,1/2-z,1/2-x'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cr   0.00000   0.00000   0.00000

