data_YB2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.17
_cell_length_b   3.17
_cell_length_c   5.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YB2As
_chemical_formula_sum   'Y1 B2 As1'
_cell_volume   57.13
_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  0.59  0.59  0.68  1.0
  B  B1  1  0.59  0.59  0.15  1.0
  B  B2  1  0.0  0.0  0.01  1.0
  As  As0  1  0.0  0.0  0.69  1.0

data_YB2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   5.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YB2As
_chemical_formula_sum   'Y2 B4 As2'
_cell_volume   114.27
_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  0.09  0.5  0.68  1.0
  B  B1  2  0.0  0.0  0.01  1.0
  B  B2  2  0.09  0.5  0.15  1.0
  As  As3  2  0.0  0.0  0.69  1.0

Y B B As
YB2As crystallizes in the monoclinic Cm space group. Y(1) is bonded in a 3-coordinate geometry to two equivalent B(1) and four equivalent As(1) atoms. There is one shorter (2.66 Å) and one longer (3.02 Å) Y(1)-B(1) bond length. There are a spread of Y(1)-As(1) bond distances ranging from 1.86-2.63 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Y(1) and one B(2) atom. The B(1)-B(2) bond length is 2.02 Å. In the second B site, B(2) is bonded in a 1-coordinate geometry to one B(1) and one As(1) atom. The B(2)-As(1) bond length is 1.81 Å. As(1) is bonded to four equivalent Y(1) and one B(2) atom to form a mixture of distorted edge and corner-sharing AsY4B square pyramids.