data_global
_amcsd_formula_title 'Ni2 O7 P2'
loop_
_publ_author_name
'Masse R'
'Guitel J'
'Durif A'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 14 
_journal_year 1979
_journal_page_first 337
_journal_page_last 341
_publ_section_title
;
 Structure cristalline d'une nouvelle variante de pyrophosphate de
 nickel Ni2 P2 O7
 _cod_database_code 1007247
;
_database_code_amcsd 0015929
_chemical_formula_sum 'Ni2 P2 O7'
_cell_length_a 5.212
_cell_length_b 9.913
_cell_length_c 4.475
_cell_angle_alpha 90
_cell_angle_beta 97.46
_cell_angle_gamma 90
_cell_volume 229.251
_exptl_crystal_density_diffrn      4.220
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ni1   0.58406   0.34344   0.90340
P1   0.65690   0.11126   0.35790
O1   0.76180   0.20370   0.61770
O2   0.46350   0.17930   0.11940
O3   0.87130   0.04150   0.21320
O4   0.50000   0.00000   0.50000