data_global
_chemical_name_mineral 'Trigodomeykite'
loop_
_publ_author_name
'Steenberg B'
_journal_name_full 'Arkiv for Kemi, Mineralogi och Geologi'
_journal_volume A12 
_journal_year 1938
_journal_page_first 1
_journal_page_last 15
_publ_section_title
;
 The crystal structure of Cu3As and Cu3P
;
_database_code_amcsd 0017898
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Cu3 As'
_cell_length_a 7.088
_cell_length_b 7.088
_cell_length_c 7.232
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 314.656
_exptl_crystal_density_diffrn      8.409
_symmetry_space_group_name_H-M 'P -3 c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-y,-x,1/2+z'
  'y,-x+y,-z'
  '-x,-x+y,1/2-z'
  '-x+y,-x,z'
  '-x+y,y,1/2+z'
  '-x,-y,-z'
  'y,x,1/2-z'
  '-y,x-y,z'
  'x,x-y,1/2+z'
  'x-y,x,-z'
  'x-y,-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cu1   0.00000   0.00000   0.00000
Cu2   0.33333   0.66667   0.15000
Cu3   0.68000   0.07000   0.08000
As   0.33333   0.00000   0.25000