data_global
_chemical_name_mineral 'Hemimorphite'
loop_
_publ_author_name
'Ito T'
'West J'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 83 
_journal_year 1932
_journal_page_first 1
_journal_page_last 8
_publ_section_title
;
 The Structure of Hemimorphite (H2 Zn2 Si O5)
 _cod_database_code 1011257
;
_database_code_amcsd 0018118
_chemical_formula_sum 'Si Zn2 O5'
_cell_length_a 8.38
_cell_length_b 10.7
_cell_length_c 5.11
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 458.193
_exptl_crystal_density_diffrn      3.463
_symmetry_space_group_name_H-M 'I m m 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+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'
  '-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
Si1   0.00000   0.16000   0.00000
Zn1   0.30000   0.34200   0.01000
O1   0.00000   0.00000   0.00000
O2   0.16100   0.18700   0.85000
O3   0.00000   0.18700   0.30500
O4   0.25000   0.50000   0.85000
O5   0.00000   0.50000   0.35000