data_global
_amcsd_formula_title 'BaZn2Si2O7'
loop_
_publ_author_name
'Lin J H'
'Lu G X'
'Du J'
'Su M Z'
'Loong C K'
'Richardson J W'
_journal_name_full 'Journal of Physics and Chemistry of Solids'
_journal_volume 60 
_journal_year 1999
_journal_page_first 975
_journal_page_last 983
_publ_section_title
;
 Phase transition and crystal structure of BaZn2Si2O7
 Note: T = 350 C
;
_database_code_amcsd 0019238
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ba Zn2 Si2 O7'
_cell_length_a 7.6199
_cell_length_b 13.0265
_cell_length_c 6.7374
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 668.759
_exptl_crystal_density_diffrn      4.333
_symmetry_space_group_name_H-M 'C c m 21'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,-y,1/2+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_U_iso_or_equiv
Ba   0.28210   0.00000  -0.12200   0.05020
Zn   0.50600   0.23010   0.11200   0.01640
Si   0.19700   0.11480   0.38100   0.01610
O1   0.11030   0.00000   0.36400   0.02770
O2   0.32810   0.12050   0.19800   0.04190
O3   0.29980   0.13640   0.59100   0.02500
O4   0.03370   0.19630   0.36500   0.03250