data_global
_chemical_name_mineral 'Bromcarnallite'
loop_
_publ_author_name
'Andress K'
'Saffe O'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 101 
_journal_year 1939
_journal_page_first 451
_journal_page_last 469
_publ_section_title
;
 Roentgenographische Untersuchung der Mischkristallreihe Karnallit-
 Bromkarnallit
 _cod_database_code 1010933
;
_database_code_amcsd 0017655
_chemical_formula_sum 'Mg K (Br1.5 Cl1.5) O6'
_cell_length_a 13.370
_cell_length_b 13.370
_cell_length_c 6.713
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1199.995
_exptl_crystal_density_diffrn      1.840
_symmetry_space_group_name_H-M 'P 4/n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'y,-x,-z'
  '1/2-y,1/2+x,z'
  '1/2+x,1/2+y,-z'
  '-x,-y,z'
  '-y,x,-z'
  '1/2+y,1/2-x,z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
Mg1   0.25000   0.25000   0.50000   1.00000
K1   0.00000   0.00000   0.00000   1.00000
K2   0.00000   0.50000   0.08000   1.00000
Br1   0.00000   0.00000   0.50000   0.50000
Br2   0.00000   0.50000   0.58000   0.50000
Br3   0.00000   0.25000   0.00800   0.50000
Cl1   0.00000   0.00000   0.50000   0.50000
Cl2   0.00000   0.50000   0.58000   0.50000
Cl3   0.00000   0.25000   0.00800   0.50000
O1   0.30000   0.30000   0.78000   1.00000
O2   0.29000   0.10000   0.58000   1.00000
O3   0.09000   0.22000   0.58000   1.00000