data_global
_chemical_name_mineral 'Norsethite'
loop_
_publ_author_name
'Effenberger H'
'Zemann J'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 171 
_journal_year 1985
_journal_page_first 275
_journal_page_last 280
_publ_section_title
;
 Single crystal X-Ray investigation of norsethite, BaMg(CO3)2:
 one more mineral with an aplanar carbonate group
 Sample: Model 3
;
_database_code_amcsd 0010926
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ba Mg C2 O6'
_cell_length_a 5.022
_cell_length_b 5.022
_cell_length_c 16.770
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 366.283
_exptl_crystal_density_diffrn      3.831
_symmetry_space_group_name_H-M 'R -3 m'
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'
  'x,x-y,z'
  '2/3+x,1/3+x-y,1/3+z'
  '1/3+x,2/3+x-y,2/3+z'
  'y,x,-z'
  '2/3+y,1/3+x,1/3-z'
  '1/3+y,2/3+x,2/3-z'
  '-x+y,y,z'
  '2/3-x+y,1/3+y,1/3+z'
  '1/3-x+y,2/3+y,2/3+z'
  '-x,-x+y,-z'
  '2/3-x,1/3-x+y,1/3-z'
  '1/3-x,2/3-x+y,2/3-z'
  '-y,-x,z'
  '2/3-y,1/3-x,1/3+z'
  '1/3-y,2/3-x,2/3+z'
  'x-y,-y,-z'
  '2/3+x-y,1/3-y,1/3-z'
  '1/3+x-y,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_occupancy
Ba   0.00000   0.00000   0.00000   1.00000
Mg   0.00000   0.00000   0.50000   1.00000
C   0.00000   0.00000   0.23920   1.00000
O   0.17400  -0.11800   0.24160   0.50000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ba 0.01130 0.01130 0.01590 0.00565 0.00000 0.00000
Mg 0.00950 0.00950 0.01400 0.00475 0.00000 0.00000
C 0.01090 0.01090 0.01300 0.00540 0.00000 0.00000
O 0.02500 0.02900 0.02500 0.02200 -0.00500 -0.00800