data_1010860
_chemical_name_systematic          'Diammonium copper bromide dihydrate'
_chemical_formula_structural       '(N H4)2 Cu Br4 (H2 O)2'
_chemical_formula_sum              'H12 Br4 Cu N2 O2'
_publ_section_title                'Sur quelques complexes bromocupriques.'
_publ_author_name                  'Silberstein, M A'
_journal_name_full
;
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences
(1884 - 1965)
;
_journal_coden_ASTM                COREAF
_journal_volume                    205
_journal_year                      1937
_journal_page_first                909
_journal_page_last                 911
_cell_length_a                     8.14
_cell_length_b                     8.14
_cell_length_c                     8.14
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       539.4
_cell_formula_units_Z              0
_symmetry_space_group_name_H-M     'P 42/m n m'
_symmetry_Int_Tables_number        136
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '-x,-y,-z'
  'x,y,-z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+x,1/2-y,1/2-z'
  'y,x,z'
  '-y,-x,z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+y,1/2-x,1/2+z'
  '-y,-x,-z'
  'y,x,-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2-z'