data_global
_chemical_name_mineral 'Blossite'
loop_
_publ_author_name
'Robinson P D'
'Hughes J M'
'Malinconico M L'
_journal_name_full 'American Mineralogist'
_journal_volume 72 
_journal_year 1987
_journal_page_first 397
_journal_page_last 400
_publ_section_title
;
 Blossite, alpha-Cu2V2O7, a new fumarolic sublimate from Izalco volcano, El Salvador
 - data obtained by personal communication, May 2003.
;
_database_code_amcsd 0001075
_chemical_formula_sum 'Cu2 V2 O7'
_cell_length_a 20.676
_cell_length_b 8.392
_cell_length_c 6.446
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1118.465
_exptl_crystal_density_diffrn      4.050
_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   0.16590   0.36390   0.75000 ?
V   0.19880   0.40520   0.23280 ?
O1   0.16160   0.34830   0.45320   0.01773
O2   0.24540   0.56160   0.26760   0.02406
O3   0.14400   0.43580   0.02830   0.01267
O4   0.25000   0.25000   0.15430   0.03673
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Cu 0.01668 0.03033 0.00463 -0.01450 0.00284 -0.00274
V 0.00541 0.01320 0.00421 0.00088 -0.00101 0.00137