data_YCoAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.61
_cell_length_b   3.61
_cell_length_c   5.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YCoAs2
_chemical_formula_sum   'Y1 Co1 As2'
_cell_volume   75.22
_cell_formula_units_Z   1
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
  Y  Y3  1  0.81  0.81  0.56  1.0
  Co  Co2  1  0.0  0.0  0.38  1.0
  As  As0  1  0.0  0.0  0.71  1.0
  As  As1  1  0.81  0.81  0.76  1.0

data_YCoAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.11
_cell_length_b   5.11
_cell_length_c   5.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YCoAs2
_chemical_formula_sum   'Y2 Co2 As4'
_cell_volume   150.43
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Y  Y0  2  0.31  0.5  0.56  1.0
  Co  Co1  2  0.0  0.0  0.38  1.0
  As  As2  2  0.0  0.0  0.71  1.0
  As  As3  2  0.31  0.5  0.76  1.0

Y Co As As
Y Co As As 0 1 + + o 0 2 + + o 0 3 o o o 2 3 - - o 
YCoAs2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two YCoAs2 clusters. Y(1) is bonded in a 3-coordinate geometry to one Co(1), one As(1), and one As(2) atom. The Y(1)-Co(1) bond length is 1.43 Å. The Y(1)-As(1) bond length is 1.34 Å. The Y(1)-As(2) bond length is 1.18 Å. Co(1) is bonded in a distorted single-bond geometry to one Y(1) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 1-coordinate geometry to one Y(1) atom. In the second As site, As(2) is bonded in a distorted single-bond geometry to one Y(1) atom.