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