data_9000105
_chemical_name 'Dolomite'
loop_
_publ_author_name
'Graf D L'
_journal_name_full "American Mineralogist"
_journal_volume 46
_journal_year 1961
_journal_page_first 1283
_journal_page_last 1316
_publ_section_title
;
 Crystallographic tables for the rhombohedral carbonates
;
_chemical_formula_sum 'Ca Mg C2 O6'
_cell_length_a 4.8079
_cell_length_b 4.8079
_cell_length_c 16.010
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 320.504
_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
Ca   0.00000   0.00000   0.00000
Mg   0.00000   0.00000   0.50000
C   0.00000   0.00000   0.24350
O   0.23740  -0.03470   0.24400