data_global _chemical_name_mineral 'Tillmannsite' loop_ _publ_author_name 'Sarp H' 'Pushcharovsky D Y' 'MacLean E J' 'Teat S J' 'Zubkova N V' _journal_name_full 'European Journal of Mineralogy' _journal_volume 15 _journal_year 2003 _journal_page_first 177 _journal_page_last 180 _publ_section_title ; Tillmannsite, (Ag3Hg)(V,As)O4, a new mineral: its description and crystal structure ; _database_code_amcsd 0006963 _chemical_formula_sum '(Ag3.01 Hg.99) V.68 As.36 O4' _cell_length_a 7.727 _cell_length_b 7.727 _cell_length_c 4.648 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 277.516 _exptl_crystal_density_diffrn 7.765 _symmetry_space_group_name_H-M 'I -4' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' 'y,-x,-z' '1/2+y,1/2-x,1/2-z' '-x,-y,z' '1/2-x,1/2-y,1/2+z' '-y,x,-z' '1/2-y,1/2+x,1/2-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 Ag 0.57070 0.66240 0.28960 0.75250 0.02546 Hg 0.57070 0.66240 0.28960 0.24750 0.02546 V 0.50000 0.00000 0.75000 0.68000 0.01900 As 0.50000 0.00000 0.75000 0.36000 0.01900 O 0.65900 0.91590 0.54800 1.00000 0.02280