data_global
_chemical_name_mineral 'Dolomite'
loop_
_publ_author_name
'Steinfink H'
'Sans F J'
_journal_name_full "American Mineralogist"
_journal_volume 44 
_journal_year 1959
_journal_page_first 679
_journal_page_last 682
_publ_section_title
;
 Refinement of the crystal structure of dolomite
;
_chemical_formula_sum 'Ca Mg C2 O6'
_cell_length_a 4.815
_cell_length_b 4.815
_cell_length_c 16.119
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 323.639
_exptl_crystal_density_diffrn      2.838
_symmetry_space_group_name_H-M 'R -3'
loop_
_symmetry_equiv_pos_as_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
_atom_site_U_iso_or_equiv
Ca   0.00000   0.00000   0.00000   0.00469
Mg   0.00000   0.00000   0.50000   0.00253
C   0.00000   0.00000   0.24350   0.00785
O   0.23740  -0.03470   0.24400   0.00747

