data_2105352
_publ_section_title
;
 The structures of alpha-Ca Cu, beta-Ca Cu, Sr Ag and Ba Ag: Four
 different stacking variants based on noble-metal- centered trigonal
 prisms
;
_journal_name_full               'Acta Crystallographica B (24,1968-38,1982)'
_journal_page_first              500
_journal_page_last               503
_journal_paper_doi               10.1107/S0567740881003476
_journal_volume                  37
_journal_year                    1981
_chemical_formula_sum            'Ag Sr'
_chemical_name_systematic        'Ag Sr'
_space_group_IT_number           62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   16.558
_cell_length_b                   4.788
_cell_length_c                   6.385
_cell_volume                     506.201
_citation_journal_id_ASTM        ACBCAR
_[local]_cod_data_source_file    silver1-2_546.cif
_[local]_cod_data_source_block   Ag1Sr1
_[local]_cod_chemical_formula_sum_orig 'Ag1 Sr1'
_cod_database_code               2105352
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x+1/2,-y,z+1/2
x+1/2,-y+1/2,-z+1/2
-x,y+1/2,-z
-x,-y,-z
x-1/2,y,-z-1/2
-x-1/2,y-1/2,z-1/2
x,-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
Ag2 Ag 0.1078 0.25 0.257 1 0.0
Sr1 Sr 0.2851 0.25 0.5127 1 0.0
Sr2 Sr 0.0349 0.25 0.7467 1 0.0
Ag1 Ag 0.3574 0.25 0.0027 1 0.0
