data_global
_chemical_name_mineral 'Eitelite'
loop_
_publ_author_name
'Pabst A'
_journal_name_full 'American Mineralogist'
_journal_volume 58
_journal_year 1973
_journal_page_first 211
_journal_page_last 217
_publ_section_title
;
 The crystallography and structure of eitelite, Na2Mg(CO3)2
;
_database_code_amcsd 307
_chemical_formula_sum 'Na2 Mg C2 O6'
_cell_length_a 4.942
_cell_length_b 4.942
_cell_length_c 16.406
_cell_angle_alpha 90.0
_cell_angle_beta 90.0
_cell_angle_gamma 120.0
_cell_volume 347.007
_exptl_crystal_density_diffrn  2.732
_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
Na   0.0  0.0  0.196  0.00507
Mg   0.0  0.0  0.0  0.00507
C   0.0  0.0  0.41  0.00507
O   0.293  0.092  0.41  0.00507