data_1010693
_chemical_name_systematic          'Sodium undecaaluminium oxide'
_chemical_formula_structural       'Na Al11 O17'
_chemical_formula_sum              'Al11 Na O17'
_publ_section_title
;
The formula of $-beta-alumina, Na~2~ O (Al~2~ O~3~)~11~
;
loop_
_publ_author_name
  'Beevers, C A'
  'Brohult, S'
_journal_name_full
;
Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,
Kristallchemie (-144,1977)
;
_journal_coden_ASTM                ZEKGAX
_journal_volume                    95
_journal_year                      1936
_journal_page_first                472
_journal_page_last                 474
_cell_length_a                     5.584(5)
_cell_length_b                     5.584
_cell_length_c                     22.45(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  120
_cell_volume                       606.2
_cell_formula_units_Z              2
_exptl_crystal_density_meas        3.24