data_1010528
_chemical_name_systematic          'Ammonium aluminium sulfate dodecahydrate'
_chemical_formula_structural       'N H4 Al (S O4)2 (H2 O)12'
_chemical_formula_sum              'H28 Al N O20 S2'
_publ_section_title                'The Crystal Structure of the Alums'
loop_
_publ_author_name
  'Lipson, H'
  'Beevers, C A'
_journal_name_full
;
Proceedings of the Royal Society of London, Series A: Mathematical and
Physical Sciences (76,1906-)
;
_journal_coden_ASTM                PRLAAZ
_journal_volume                    148
_journal_year                      1934
_journal_page_first                664
_journal_page_last                 680
_cell_length_a                     12.215
_cell_length_b                     12.215
_cell_length_c                     12.215
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       1822.6
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'P a -3'
_symmetry_Int_Tables_number        205
_symmetry_cell_setting             cubic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,-z'
  '-x,1/2+y,1/2-z'
  '1/2-x,-y,1/2+z'
  'y,z,x'
  '1/2-y,-z,1/2+x'
  '1/2+y,1/2-z,-x'
  '-y,1/2+z,1/2-x'
  'z,x,y'
  '-z,1/2+x,1/2-y'
  '1/2-z,-x,1/2+y'
  '1/2+z,1/2-x,-y'
  '-x,-y,-z'
  '1/2-x,1/2+y,z'
  'x,1/2-y,1/2+z'
  '1/2+x,y,1/2-z'
  '-y,-z,-x'
  '1/2+y,z,1/2-x'
  '1/2-y,1/2+z,x'
  'y,1/2-z,1/2+x'
  '-z,-x,-y'
  'z,1/2-x,1/2+y'
  '1/2+z,x,1/2-y'
  '1/2-z,1/2+x,y'