data_1520913
_publ_section_title
;
 On the occurrence of M2 X intermetallic compounds (M = Ca, Sr, Ba; X =
 Si, Ge, Sn, Pb)
;
_journal_name_full               'Journal of the Less-Common Metals'
_journal_page_first              201
_journal_page_last               208
_journal_volume                  57
_journal_year                    1978
_chemical_formula_sum            'Si Sr2'
_chemical_name_systematic        'Sr2 Si'
_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            4
_cell_length_a                   8.13
_cell_length_b                   5.16
_cell_length_c                   9.54
_cell_volume                     400.211
_citation_journal_id_ASTM        JCOMAH
_cod_data_source_file            Bruzzone_JCOMAH_1978_1654.cif
_cod_data_source_block           Si1Sr2
_cod_original_cell_volume        400.2106
_cod_chemical_formula_sum_orig   'Si1 Sr2'
_cod_database_code               1520913
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
Sr1 Sr 0.847 0.25 0.077 1 0.0
Sr2 Sr 0.981 0.25 0.675 1 0.0
Si1 Si 0.246 0.25 0.103 1 0.0
