data_global
_chemical_name_mineral 'Blossite'
loop_
_publ_author_name
'Mercurio-Lavaud D'
'Frit B'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 29 
_journal_year 1973
_journal_page_first 2737
_journal_page_last 2741
_publ_section_title
;
 Structure cristalline de la variete basse temperature
 du pyrovanadate de cuivre: Cu2V2O7 alpha
;
_database_code_amcsd 0009498
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Cu2 V2 O7'
_cell_length_a 20.680
_cell_length_b 8.411
_cell_length_c 6.448
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1121.562
_exptl_crystal_density_diffrn      4.039
_symmetry_space_group_name_H-M 'F d d 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/4+x,1/4-y,1/4+z'
  '1/4+x,3/4-y,3/4+z'
  '3/4+x,1/4-y,3/4+z'
  '3/4+x,3/4-y,1/4+z'
  '1/4-x,1/4+y,1/4+z'
  '1/4-x,3/4+y,3/4+z'
  '3/4-x,1/4+y,3/4+z'
  '3/4-x,3/4+y,1/4+z'
  '-x,1/2-y,1/2+z'
  '-x,-y,+z'
  '1/2-x,1/2-y,+z'
  '1/2-x,-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
Cu   0.16600   0.36400   0.75000   0.01482
V   0.19900   0.40500   0.23400   0.00937
O1   0.25000   0.25000   0.15200   0.03268
O2   0.24400   0.56000   0.27900   0.02394
O3   0.14400   0.43800   0.02800   0.01305
O4   0.16200   0.33900   0.46100   0.02406