data_2011198
_journal_name_full  'Acta Crystallographica, Section C'
_journal_year  2000
_journal_volume  56
_journal_page_first  916
_journal_page_last  918
_publ_section_title
;
Structural study of AgNbO~3~ at room temperature
;
loop_
_publ_author_name
  "F\'abry, Jan"
  'Zikmund, Zden\<ek'
  'Kania, Antoni'
  "Pet\<r\'i\<cek, V\'aclav"
_chemical_formula_moiety  'Ag Nb O3'
_chemical_formula_sum  'Ag Nb O3'
_chemical_formula_structural  'Ag Nb O3'
_chemical_formula_iupac  'Ag Nb O3'
_chemical_formula_weight  248.77
_symmetry_cell_setting  orthorhombic
_symmetry_space_group_name_H-M  'P b c m'
loop_
_symmetry_equiv_pos_as_xyz
  'x, y, z'
  'x, y, -z+1/2'
  '-x, y+1/2, z'
  '-x, y+1/2, -z+1/2'
  '-x, -y, -z'
  '-x, -y, z+1/2'
  'x, -y+1/2, -z'
  'x, -y+1/2, z+1/2'
_cell_length_a  5.5462(3)
_cell_length_b  5.6028(4)
_cell_length_c  15.6365(13)
_cell_angle_alpha  90.00
_cell_angle_beta  90.00
_cell_angle_gamma  90.00
_cell_volume  485.90(6)
_cell_formula_units_Z  8
_cell_measurement_temperature  292.0(10)
_exptl_crystal_density_diffrn  6.799
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_type_symbol
  Ag1  .75770(3) 0.22738(7) 3/4  .01280(10)
  Uani 1 Ag
  Ag2  .75550(3) 1/4 1/2  .01280(10)
  Uani 1 Ag
  Nb  .74525(2) 0.72338(7) 0.625014(8)  .00590(10)
  Uani 1 Nb
  O1  .6978(2) 0.7664(2) 3/4  .0090(4) Uani 1 O
  O2  .8043(2) 3/4 1/2  .0095(4) Uani 1 O
  O3  .4662(2) 0.5364(2) 0.61132(6)  .0088(3) Uani 1 O
  O4  -.0334(2) 0.4727(2) 0.63865(7)  .0092(3) Uani 1 O
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
_atom_site_aniso_type_symbol
  Ag1  .0128(2)  .0123(2)  .0133(2)  -.00211(4)  .0000  .0000 Ag
  Ag2  .0113(2)  .01410(10)
  .0130(2)  .0000  .0000  .00107(7) Ag
  Nb  .0051(2)  .0040(2)  .0085(2)  -.00014(3)  -.00061(4)  .00031(4) Nb
  O1  .0118(6)  .0119(7)  .0031(7)  .0009(4)  .0000  .0000 O
  O2  .0100(6)  .0127(6)  .0059(7)  .0000  .0000  .0004(4) O
  O3  .0064(4)  .0084(5)  .0115(5)  -.0033(3)  -.0013(3)  .0014(3) O
  O4  .0086(4)  .0077(5)  .0114(5)  .0030(3)  .0010(3)  .0013(3) O
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_1
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
  Nb O1 . . 1.9866(3) yes
  Nb O2 . . 1.9876(3) yes
  Nb O3 . . 1.8811(9) yes
  Nb O3 . 3_655 2.1210(10)
  yes
  Nb O4 . 1_655 1.8780(10)
  yes
  Nb O4 . 3_655 2.1333(9) yes
  Ag1 O1 . 1_545 2.6040(10)
  yes
  Ag1 O1 . 3_645 2.5360(10)
  yes
  Ag1 O3 . 3_645 2.7190(10)
  yes
  Ag1 O3 . 4_646 2.7200(10)
  yes
  Ag1 O4 . 1_655 2.5030(10)
  yes
  Ag1 O4 . 2_656 2.5030(10)
  yes
  Ag1 O4 . 3_645 2.7210(10)
  yes
  Ag1 O4 . 4_646 2.7210(10)
  yes
  Ag1 O1 . . 3.0380(10)
  yes
  Ag1 O1 . 3_745 3.0280(10)
  yes
  Ag1 O3 . . 3.2110(10)
  yes
  Ag1 O3 . 2_556 3.2110(10)
  yes
  Ag2 O2 . 1_545 2.81440(10)
  yes
  Ag2 O2 . . 2.81440(10)
  yes
  Ag2 O2 . 5_766 2.4420(10)
  yes
  Ag2 O2 . 5_666 3.1050(10)
  yes
  Ag2 O3 . . 2.8597(9) yes
  Ag2 O3 . 5_666 2.4440(10)
  yes
  Ag2 O3 . 3_645 2.4440(10)
  yes
  Ag2 O3 . 7_556 2.8597(9) yes
  Ag2 O4 . 1_655 2.7620(10)
  yes
  Ag2 O4 . 7_656 2.7620(10)
  yes
  Ag2 O4 . 5_666 3.0810(10)
  yes
  Ag2 O4 . 3_645 3.0810(10)
  yes