data_global
_chemical_name_mineral 'Nepheline'
loop_
_publ_author_name
'Buerger M'
'Klein G'
'Hamburger G'
_journal_name_full 'Geological Society of America, Bulletin'
_journal_volume 57 
_journal_year 1946
_journal_page_first 1182
_journal_page_last 1183
_publ_section_title
;
 Structure of Nepheline
 _cod_database_code 1008761
;
_database_code_amcsd 0016638
_chemical_formula_sum 'Na Si Al O4'
_cell_length_a 10.05
_cell_length_b 10.05
_cell_length_c 8.38
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 733.005
_exptl_crystal_density_diffrn      2.574
_symmetry_space_group_name_H-M 'P 63'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x-y,x,1/2+z'
  '-y,x-y,z'
  '-x,-y,1/2+z'
  '-x+y,-x,z'
  'y,-x+y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Na1   0.00000   0.00000   0.00000
Si1   0.33333   0.66667   0.82000
Al1   0.33333   0.66667   0.18000
O1   0.33333   0.66667   0.00000
Na2   0.01000   0.43000   0.00000
Si2   0.09000   0.33333   0.33333
Al2   0.09000   0.33333   0.66667
O2   0.02000   0.33333   0.50000
O3   0.17000   0.52000   0.75000
O4   0.17000   0.52000   0.25000
O5   0.25000   0.28000   0.25000
O6   0.25000   0.28000   0.75000