data_global
_chemical_name_mineral 'Natrite'
loop_
_publ_author_name
'Zubkova N V'
'Pushcharovsky D Y'
'Ivaldi G'
'Ferraris G'
'Pekov I V'
'Chukanov N V'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 2002 
_journal_year 2002
_journal_page_first 85
_journal_page_last 96
_publ_section_title
;
 Crystal structure of natrite, gamma-Na2CO3
;
_database_code_amcsd 0014917
_chemical_compound_source 'Mt Koashva, Khibiny alkaline massif, Kola Peninsula, Russia'
_chemical_formula_sum 'Na2 C O3'
_cell_length_a 8.905
_cell_length_b 5.237
_cell_length_c 6.045
_cell_angle_alpha 90
_cell_angle_beta 101.32
_cell_angle_gamma 90
_cell_volume 276.427
_exptl_crystal_density_diffrn      2.547
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na1   0.00000   0.00000   0.00000   0.02875
Na2   0.00000   0.00000   0.50000   0.03116
Na3   0.17047   0.50000   0.74780   0.04078
C   0.16450   0.50000   0.24970   0.02343
O1   0.10230   0.29440   0.28590   0.05801
O2   0.28940   0.50000   0.17810   0.02292