data_7209349
_publ_section_title
;
 AgNb3O8-II, eine Hochdruckphase mit neuartiger Tunnelstruktur
;
_journal_name_full
;
Zeitschrift fuer Naturforschung, Teil B. Anorganische Chemie, Organische
 Chemie (42,1987-)
;
_journal_page_first              499
_journal_page_last               501
_journal_volume                  44
_journal_year                    1989
_chemical_formula_sum            'Ag Nb3 O8'
_chemical_name_systematic        'Ag Nb3 O8'
_space_group_IT_number           72
_symmetry_space_group_name_Hall  '-I 2 2c'
_symmetry_space_group_name_H-M   'I b a m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.343
_cell_length_b                   10.415
_cell_length_c                   7.007
_cell_volume                     535.877
_citation_journal_id_ASTM        ZNBSEN
_[local]_cod_data_source_file    silver1-2_450.cif
_[local]_cod_data_source_block   Ag1Nb3O8
_[local]_cod_chemical_formula_sum_orig 'Ag1 Nb3 O8'
_cod_original_cell_volume        535.8768
_cod_database_code               7209349
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,z
x,-y,-z+1/2
-x,y,-z+1/2
-x,-y,-z
x,y,-z
-x,y,z-1/2
x,-y,z-1/2
x+1/2,y+1/2,z+1/2
-x+1/2,-y+1/2,z+1/2
x+1/2,-y+1/2,-z+1
-x+1/2,y+1/2,-z+1
-x+1/2,-y+1/2,-z+1/2
x+1/2,y+1/2,-z+1/2
-x+1/2,y+1/2,z
x+1/2,-y+1/2,z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
O2 O-2 0.1138 0.4279 0 1 0.0
Ag1 Ag+1 0 0 0.25 1 0.0
Nb1 Nb+5 0 0.5 0.75 1 0.0
O1 O-2 0.9893 0.1714 0 1 0.0
O3 O-2 0.1918 0.3569 0.2993 1 0.0
Nb2 Nb+5 0.2529 0.26755 0 1 0.0
