data_global _chemical_name_mineral 'Dreyerite' loop_ _publ_author_name 'Dreyer G' 'Tillmanns E' _journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte' _journal_volume 1981 _journal_year 1981 _journal_page_first 151 _journal_page_last 154 _publ_section_title ; Dreyerite: ein naturliches, tetragonales wismutvanadat von Hirschhorn/Pfalz ; _database_code_amcsd 0014769 _chemical_compound_source 'Hirschhorn, Pfalz, Germany' _chemical_formula_sum 'Bi V O4' _cell_length_a 7.303 _cell_length_b 7.303 _cell_length_c 6.584 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 351.150 _exptl_crystal_density_diffrn 6.127 _symmetry_space_group_name_H-M 'I 41/a m d' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '1/4-y,3/4-x,1/4+z' '3/4-y,1/4-x,3/4+z' '1/4+y,3/4+x,1/4-z' '3/4+y,1/4+x,3/4-z' '1/4+y,3/4-x,1/4-z' '3/4+y,1/4-x,3/4-z' '1/4-y,3/4+x,1/4+z' '3/4-y,1/4+x,3/4+z' '1/2+x,-y,1/2+z' '+x,1/2-y,+z' '1/2-x,y,1/2-z' '-x,1/2+y,-z' '1/2+x,y,1/2-z' '+x,1/2+y,-z' '1/2-x,-y,1/2+z' '-x,1/2-y,+z' '1/4+y,1/4+x,3/4+z' '3/4+y,3/4+x,1/4+z' '1/4-y,1/4-x,3/4-z' '3/4-y,3/4-x,1/4-z' '1/4-y,1/4+x,3/4-z' '3/4-y,3/4+x,1/4-z' '1/4+y,1/4-x,3/4+z' '3/4+y,3/4-x,1/4+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 _atom_site_U_iso_or_equiv Bi 0.00000 0.75000 0.12500 0.01646 V 0.00000 0.25000 0.37500 0.00507 O 0.00000 0.07200 0.20800 0.01267