data_global
_chemical_name_mineral 'Dolomite'
loop_
_publ_author_name
'Ross N L'
'Reeder R J'
_journal_name_full 'American Mineralogist'
_journal_volume 77 
_journal_year 1992
_journal_page_first 412
_journal_page_last 421
_publ_section_title
;
 High-pressure structural study of dolomite and ankerite
 P = 3.70 GPa
;
_database_code_amcsd 0001456
_chemical_formula_sum 'Ca Mg C2 O6'
_cell_length_a 4.7703
_cell_length_b 4.7703
_cell_length_c 15.653
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 308.475
_exptl_crystal_density_diffrn      2.978
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_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
CaA   0.00000   0.00000   0.00000   0.01064
MgB   0.00000   0.00000   0.50000   0.00532
C   0.00000   0.00000   0.24160   0.00595
O   0.24960  -0.03590   0.24430   0.01001