data_global
_chemical_name_mineral 'Dawsonite'
loop_
_publ_author_name
'Chinh L T'
'Pobedimskaya E A'
'Khomyakov A P'
_journal_name_full 'Vestnik Moskovskogo Universiteta Geologiya'
_journal_volume 42 
_journal_year 1987
_journal_page_first 74
_journal_page_last 77
_publ_section_title
;
 Crystal structure of dawsonite, NaAl(CO3)(OH)2 and its first discovery in the
 Khibiny alkaline massiv
;
_database_code_amcsd 0015709
_chemical_compound_source 'Khibiny alkaline massif, Kola peninsula, Russia'
_chemical_formula_sum 'Na Al C O5 H2'
_cell_length_a 6.762
_cell_length_b 10.428
_cell_length_c 5.593
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 394.386
_exptl_crystal_density_diffrn      2.425
_symmetry_space_group_name_H-M 'I 2 c m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,+z'
  'x,y,1/2-z'
  '1/2+x,1/2+y,-z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.74010   0.74950   0.25000   0.02368
Al  -0.00400   0.00000   0.00000   0.00874
C  -0.01800   0.75140   0.75000   0.00975
O1  -0.01500   0.36750   0.25000   0.01798
O2  -0.00150   0.81490   0.54880   0.01672
O3   0.16820  -0.02220   0.25000   0.00393
O4   0.80040  -0.02950   0.25000   0.02128
H1   0.22640   0.48370   0.25000 ?
H2   0.76490   0.46590   0.25000 ?