data_1010488
_chemical_name_systematic          'Sodium antimony(V) dialuminium oxide'
_chemical_formula_structural       'Na Sb (Al O3)2'
_chemical_formula_sum              'Al2 Na O6 Sb'
_publ_section_title                'Ueber ein neues Mineral von Langban.'
_publ_author_name                  'Aminoff, G'
_journal_name_full
;
Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,
Kristallchemie (-144,1977)
;
_journal_coden_ASTM                ZEKGAX
_journal_volume                    60
_journal_year                      1924
_journal_page_first                262
_journal_page_last                 274
_cell_length_a                     5.4
_cell_length_b                     5.4
_cell_length_c                     8.81
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       222.5
_cell_formula_units_Z              2
_exptl_crystal_density_meas        4.28
_symmetry_space_group_name_H-M     'P 63/m m c'
_symmetry_Int_Tables_number        194
_symmetry_cell_setting             hexagonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-y,x-y,z'
  'y-x,-x,z'
  '-y,-x,z'
  'y-x,y,z'
  'x,x-y,z'
  '-x,-y,-z'
  'y,y-x,-z'
  'x-y,x,-z'
  'y,x,-z'
  'x-y,-y,-z'
  '-x,y-x,-z'
  '-x,-y,1/2+z'
  'y,y-x,1/2+z'
  'x-y,x,1/2+z'
  'y,x,1/2+z'
  'x-y,-y,1/2+z'
  '-x,y-x,1/2+z'
  'x,y,1/2-z'
  '-y,x-y,1/2-z'
  'y-x,-x,1/2-z'
  '-y,-x,1/2-z'
  'y-x,y,1/2-z'
  'x,x-y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Na1+   1.000
  Sb5+   5.000
  Al3+   3.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Na1   Na1+   2 a 0. 0. 0. 1.  0 d
  Sb1   Sb5+   2 d 0.3333 0.6667 0.75 1.  0 d
  Al1   Al3+   4 f 0.3333 0.6667 0.087 1.  0 d
  O1    O2-   12 ? -1. -1. -1. 1.  0 dum