data_global
_chemical_name_mineral 'Northupite'
loop_
_publ_author_name
'Dal Negro A'
'Giuseppetti G'
'Tadini C'
_journal_name_full 'Tschermaks Mineralogische und Petrographische Mitteilungen'
_journal_volume 22 
_journal_year 1975
_journal_page_first 158
_journal_page_last 163
_publ_section_title
;
 Refinement of the crystal structure of northupite: Na3Mg(CO3)2Cl
;
_database_code_amcsd 0015654
_chemical_compound_source 'Searles Lake, California, USA'
_chemical_formula_sum 'Na3 Mg C2 O6 Cl'
_cell_length_a 14.069
_cell_length_b 14.069
_cell_length_c 14.069
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2784.772
_exptl_crystal_density_diffrn      2.373
_symmetry_space_group_name_H-M 'F d 3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/4+z,1/4+x,-y'
  '1/4+z,3/4+x,1/2-y'
  '3/4+z,1/4+x,1/2-y'
  '3/4+z,3/4+x,-y'
  '1/4+z,-x,1/4+y'
  '1/4+z,1/2-x,3/4+y'
  '3/4+z,-x,3/4+y'
  '3/4+z,1/2-x,1/4+y'
  '-z,1/4+x,1/4+y'
  '-z,3/4+x,3/4+y'
  '1/2-z,1/4+x,3/4+y'
  '1/2-z,3/4+x,1/4+y'
  '-z,-x,-y'
  '-z,1/2-x,1/2-y'
  '1/2-z,-x,1/2-y'
  '1/2-z,1/2-x,-y'
  'y,3/4-z,3/4-x'
  'y,1/4-z,1/4-x'
  '1/2+y,3/4-z,1/4-x'
  '1/2+y,1/4-z,3/4-x'
  '3/4-y,3/4-z,x'
  '3/4-y,1/4-z,1/2+x'
  '1/4-y,3/4-z,1/2+x'
  '1/4-y,1/4-z,x'
  '3/4-y,z,3/4-x'
  '3/4-y,1/2+z,1/4-x'
  '1/4-y,z,1/4-x'
  '1/4-y,1/2+z,3/4-x'
  'y,z,x'
  'y,1/2+z,1/2+x'
  '1/2+y,z,1/2+x'
  '1/2+y,1/2+z,x'
  '1/4+x,-y,1/4+z'
  '1/4+x,1/2-y,3/4+z'
  '3/4+x,-y,3/4+z'
  '3/4+x,1/2-y,1/4+z'
  '-x,1/4+y,1/4+z'
  '-x,3/4+y,3/4+z'
  '1/2-x,1/4+y,3/4+z'
  '1/2-x,3/4+y,1/4+z'
  '1/4+x,1/4+y,-z'
  '1/4+x,3/4+y,1/2-z'
  '3/4+x,1/4+y,1/2-z'
  '3/4+x,3/4+y,-z'
  '-x,-y,-z'
  '-x,1/2-y,1/2-z'
  '1/2-x,-y,1/2-z'
  '1/2-x,1/2-y,-z'
  '3/4-z,3/4-x,y'
  '3/4-z,1/4-x,1/2+y'
  '1/4-z,3/4-x,1/2+y'
  '1/4-z,1/4-x,y'
  '3/4-z,x,3/4-y'
  '3/4-z,1/2+x,1/4-y'
  '1/4-z,x,1/4-y'
  '1/4-z,1/2+x,3/4-y'
  'z,3/4-x,3/4-y'
  'z,1/4-x,1/4-y'
  '1/2+z,3/4-x,1/4-y'
  '1/2+z,1/4-x,3/4-y'
  'z,x,y'
  'z,1/2+x,1/2+y'
  '1/2+z,x,1/2+y'
  '1/2+z,1/2+x,y'
  '-y,1/4+z,1/4+x'
  '-y,3/4+z,3/4+x'
  '1/2-y,1/4+z,3/4+x'
  '1/2-y,3/4+z,1/4+x'
  '1/4+y,1/4+z,-x'
  '1/4+y,3/4+z,1/2-x'
  '3/4+y,1/4+z,1/2-x'
  '3/4+y,3/4+z,-x'
  '1/4+y,-z,1/4+x'
  '1/4+y,1/2-z,3/4+x'
  '3/4+y,-z,3/4+x'
  '3/4+y,1/2-z,1/4+x'
  '-y,-z,-x'
  '-y,1/2-z,1/2-x'
  '1/2-y,-z,1/2-x'
  '1/2-y,1/2-z,-x'
  '3/4-x,y,3/4-z'
  '3/4-x,1/2+y,1/4-z'
  '1/4-x,y,1/4-z'
  '1/4-x,1/2+y,3/4-z'
  'x,3/4-y,3/4-z'
  'x,1/4-y,1/4-z'
  '1/2+x,3/4-y,1/4-z'
  '1/2+x,1/4-y,3/4-z'
  '3/4-x,3/4-y,z'
  '3/4-x,1/4-y,1/2+z'
  '1/4-x,3/4-y,1/2+z'
  '1/4-x,1/4-y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.89770   0.12500   0.12500   0.02001
Mg   0.50000   0.50000   0.50000   0.01051
C   0.28309   0.28309   0.28309   0.01013
O   0.26270   0.23011   0.35458   0.01520
Cl   0.00000   0.00000   0.00000   0.02647
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
Na 0.02026 0.02116 0.01865 0.00000 0.00000 0.00391
Mg 0.01043 0.01043 0.01043 -0.00050 -0.00050 -0.00050
C 0.01013 0.01013 0.01013 -0.00211 -0.00211 -0.00211
O 0.01865 0.01434 0.01263 -0.00100 0.00180 0.00321
Cl 0.02647 0.02647 0.02647 -0.01023 0.01023 0.01023