data_global
_amcsd_formula_title 'KMg.10Cu.90F3'
loop_
_publ_author_name
'Burns P C'
'Hawthorne F C'
'Hofmeister A M'
'Moret S L'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 23 
_journal_year 1996
_journal_page_first 141
_journal_page_last 150
_publ_section_title
;
 A structural phase-transition in K(Mg1-xCux)F3 perovskite
 Sample: x = 0.900
;
_database_code_amcsd 0007933
_chemical_formula_sum 'K (Cu.9 Mg.1) F3'
_cell_length_a 5.8488
_cell_length_b 5.8488
_cell_length_c 7.8585
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 268.827
_exptl_crystal_density_diffrn      3.847
_symmetry_space_group_name_H-M 'I 4/m c m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '-y,-x,1/2+z'
  '1/2-y,1/2-x,+z'
  'y,x,1/2-z'
  '1/2+y,1/2+x,-z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-y,x,z'
  '1/2-y,1/2+x,1/2+z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,-z'
  'x,y,-z'
  '1/2+x,1/2+y,1/2-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  'y,x,1/2+z'
  '1/2+y,1/2+x,+z'
  '-y,-x,1/2-z'
  '1/2-y,1/2-x,-z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'y,-x,z'
  '1/2+y,1/2-x,1/2+z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
K   0.00000   0.00000   0.25000   1.00000
Cu   0.00000   0.50000   0.00000   0.90000
Mg   0.00000   0.50000   0.00000   0.10000
F1   0.00000   0.50000   0.25000   1.00000
F2   0.22490   0.72490   0.00000   1.00000