data_YSiAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.34
_cell_length_b   3.34
_cell_length_c   8.18
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YSiAs2
_chemical_formula_sum   'Y1 Si1 As2'
_cell_volume   91.18
_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  0.67  0.67  0.96  1.0
  Si  Si2  1  0.0  0.0  0.82  1.0
  As  As0  1  0.0  0.0  0.84  1.0
  As  As1  1  0.67  0.67  0.82  1.0

data_YSiAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.72
_cell_length_b   4.72
_cell_length_c   8.18
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YSiAs2
_chemical_formula_sum   'Y2 Si2 As4'
_cell_volume   182.36
_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  0.17  0.5  0.96  1.0
  Si  Si1  2  0.0  0.0  0.82  1.0
  As  As2  2  0.0  0.0  0.84  1.0
  As  As3  2  0.17  0.5  0.82  1.0

Y Si As As
YAsSiAs is alpha oxygen-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two yttrium arsenide molecules and two SiAs clusters. In each SiAs cluster, Si(1) is bonded in a single-bond geometry to one As(1) atom. The Si(1)-As(1) bond length is 0.17 Å. As(1) is bonded in a single-bond geometry to one Si(1) atom.