data_2100841
_publ_section_title
;
 Structures of cubic and orthorhombic phases of acetylene by
 single-crystal neutron diffraction
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              726
_journal_page_last               731
_journal_paper_doi               10.1107/S0108768192004774
_journal_volume                  48
_journal_year                    1992
_chemical_formula_sum            'C2 H2'
_chemical_formula_weight         26
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-P 2ac 2ab 3'
_symmetry_space_group_name_H-M   'P a -3'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.1050(8)
_cell_length_b                   6.1050(8)
_cell_length_c                   6.1050(8)
_cell_volume                     227.54(5)
_diffrn_radiation_probe          neutron
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     1.0402
_exptl_absorpt_coefficient_mu    0.146
_exptl_crystal_density_diffrn    .7602(3)
_exptl_crystal_F_000             23
_[local]_cod_data_source_file    cr0402.cif
_[local]_cod_data_source_block   cr0402b
_cod_original_cell_volume        227.54(9)
_cod_database_code               2100841
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
C .0556(3) .0556(3) .0556(3)
H .1525(7) .1525(7) .1525(7)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
C C 1.177(6)
C H 1.024(10)
