data_global
_chemical_name_mineral 'Magnesium'
loop_
_publ_author_name
'Raynor G V'
'Hume-Rothery W'
_journal_name_full 'Journal of the Institute of Metals'
_journal_volume 65 
_journal_year 1939
_journal_page_first 477
_journal_page_last 485
_publ_section_title
;
 A technique for the X-ray powder photography of reactive metals and alloys
 with special reference to the lattice spacing of magnesium at high temperatures
 Sample: at T = 597 C
 Note: experiment #9
;
_database_code_amcsd 0014122
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Mg'
_cell_length_a 3.2599
_cell_length_b 3.2599
_cell_length_c 5.2960
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 48.740
_exptl_crystal_density_diffrn      1.656
_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
Mg   0.33333   0.66667   0.25000