data_global
_chemical_name_mineral 'Chervetite'
loop_
_publ_author_name
'Kawahara A'
_journal_name_full 'Bulletin de la Societe Francaise de Mineralogie et de Cristallographie'
_journal_volume 90 
_journal_year 1967
_journal_page_first 279
_journal_page_last 284
_publ_section_title
;
 La structure cristalline de la chervetite
;
_database_code_amcsd 0012125
_chemical_compound_source 'Mounana, Gabon'
_chemical_formula_sum 'Pb2 V2 O7'
_cell_length_a 13.37
_cell_length_b 7.16
_cell_length_c 7.11
_cell_angle_alpha 90
_cell_angle_beta 106
_cell_angle_gamma 90
_cell_volume 654.268
_exptl_crystal_density_diffrn      6.378
_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
Pb1  -0.13258   0.40961   0.05457
Pb2   0.15443   0.19219   0.33423
V1   0.10748   0.06010  -0.20087
V2  -0.08527   0.32390  -0.38817
O1   0.46243   0.38074   0.13748
O2   0.18039   0.21684  -0.02918
O3   0.30039   0.45473   0.32882
O4   0.46823   0.70119   0.40100
O5   0.04238   0.48135   0.24622
O6   0.15793   0.83009   0.30641
O7   0.32602   0.13500   0.40351