data_global
_chemical_name_mineral 'Effenbergerite'
loop_
_publ_author_name
'Knight K S'
'Henderson C M B'
'Clark S M'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 22 
_journal_year 2010
_journal_page_first 411
_journal_page_last 423
_publ_section_title
;
 Structural variations in the wesselsite-effenbergerite (Sr1-xBaxCuSi4O10)
 solid solution
 Sample: x = 1.000
;
_database_code_amcsd 0018775
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ba Cu Si4 O10'
_cell_length_a 7.43602
_cell_length_b 7.43602
_cell_length_c 16.1302
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 891.910
_exptl_crystal_density_diffrn      3.524
_symmetry_space_group_name_H-M 'P 4/n c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2-z'
  '1/2+y,-x,-z'
  '1/2-y,x,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-y,z'
  'y,x,1/2+z'
  '-y,-x,1/2-z'
  '-y,1/2+x,-z'
  'y,1/2-x,z'
  '1/2-x,y,1/2+z'
  '1/2+x,-y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ba   0.25000   0.75000   0.00000   1.00000   0.11800
Cu   0.25000   0.25000   0.09490   1.00000   0.09500
Si   0.51770   0.93900   0.15390   1.00000   0.04100
O1   0.45730   0.99340   0.24520   0.50000   0.05600
O2   0.72470   0.00000   0.13670   1.00000   0.08600
O3   0.38660   0.03140   0.09030   1.00000   0.10900