The structure described by CaC2 is alpha carbon monoxide-like structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of two acetylene molecules and four methylidenecalcium molecules. is represented by the CIF card [CIF]
data_CaC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.540
_cell_length_b   11.540
_cell_length_c   21.018
_cell_angle_alpha   69.711
_cell_angle_beta   69.711
_cell_angle_gamma   71.947
_symmetry_Int_Tables_number   1
_cell_volume   2404.731
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ca  Ca0  1  0.446  0.446  0.245  1.0
  Ca  Ca1  1  0.554  0.554  0.755  1.0
  C  C2  1  0.985  0.985  0.478  1.0
  C  C3  1  0.015  0.015  0.522  1.0
  C  C4  1  0.577  0.577  0.211  1.0
  C  C5  1  0.423  0.423  0.789  1.0
[/CIF]
.
The structure described by CaC2 is alpha carbon monoxide-like structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of two acetylene molecules and four methylidenecalcium molecules. is represented by the CIF card [CIF]
data_CaC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.540
_cell_length_b   11.540
_cell_length_c   21.018
_cell_angle_alpha   69.711
_cell_angle_beta   69.711
_cell_angle_gamma   71.947
_symmetry_Int_Tables_number   1
_cell_volume   2404.731
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ca  Ca0  1  0.446  0.446  0.245  1.0
  Ca  Ca1  1  0.554  0.554  0.755  1.0
  C  C2  1  0.985  0.985  0.478  1.0
  C  C3  1  0.015  0.015  0.522  1.0
  C  C4  1  0.577  0.577  0.211  1.0
  C  C5  1  0.423  0.423  0.789  1.0
[/CIF]
.