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