data_global
_amcsd_formula_title 'Cu Na2 O7 P2'
loop_
_publ_author_name
'Erragh F'
'Boukhari A'
'Abraham F'
'Elouadi B'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 120 
_journal_year 1995
_journal_page_first 23
_journal_page_last 31
_publ_section_title
;
 The crystal structure of alpha- and beta- Na2 Cu P2 O7
 _cod_database_code 1004113
;
_database_code_amcsd 0013877
_chemical_formula_sum 'Cu P2 Na2 O7'
_cell_length_a 14.728
_cell_length_b 5.698
_cell_length_c 8.067
_cell_angle_alpha 90
_cell_angle_beta 115.15
_cell_angle_gamma 90
_cell_volume 612.805
_exptl_crystal_density_diffrn      3.073
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cu1   0.00000   0.00000   0.00000
P1   0.10478   0.34114   0.84425
Na1   0.27068   0.63990   0.20090
O1   0.10170   0.21350   0.00770
O2   0.18780   0.51600   0.89830
O3   0.10720   0.16770   0.70060
O4   0.00000   0.48250   0.75000