The crystal structure described by RhAs2 crystallizes in the monoclinic P2_1/c space group. Rh(1) is bonded to three equivalent As(1) and three equivalent As(2) atoms to form RhAs6 octahedra that share corners with eight equivalent Rh(1)As6 octahedra, corners with three equivalent As(1)AsRh3 tetrahedra, corners with three equivalent As(2)AsRh3 tetrahedra, and edges with two equivalent Rh(1)As6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. There are two inequivalent As sites. In the first As site, As(1) is bonded to three equivalent Rh(1) and one As(2) atom to form AsAsRh3 tetrahedra that share corners with three equivalent Rh(1)As6 octahedra, corners with four equivalent As(1)AsRh3 tetrahedra, corners with nine equivalent As(2)AsRh3 tetrahedra, and  an edgeedge with one As(1)AsRh3 tetrahedra. The corner-sharing octahedral tilt angles range from 68-72°. In the second As site, As(2) is bonded to three equivalent Rh(1) and one As(1) atom to form distorted AsAsRh3 tetrahedra that share corners with three equivalent Rh(1)As6 octahedra, corners with four equivalent As(2)AsRh3 tetrahedra, corners with nine equivalent As(1)AsRh3 tetrahedra, and  an edgeedge with one As(2)AsRh3 tetrahedra. The corner-sharing octahedral tilt angles range from 73-78°. is represented by the Crystallographic Information File (CIF) [CIF]
data_As2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.088
_cell_length_b   6.103
_cell_length_c   6.179
_cell_angle_alpha   90.000
_cell_angle_beta   114.097
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   209.601
_cell_formula_units_Z   4
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
  As  As0  1  0.157  0.872  0.870  1.0
  As  As1  1  0.843  0.372  0.630  1.0
  As  As2  1  0.843  0.128  0.130  1.0
  As  As3  1  0.157  0.628  0.370  1.0
  As  As4  1  0.339  0.371  0.182  1.0
  As  As5  1  0.661  0.871  0.318  1.0
  As  As6  1  0.661  0.629  0.818  1.0
  As  As7  1  0.339  0.129  0.682  1.0
  Rh  Rh8  1  0.272  0.499  0.789  1.0
  Rh  Rh9  1  0.728  0.999  0.711  1.0
  Rh  Rh10  1  0.728  0.501  0.211  1.0
  Rh  Rh11  1  0.272  0.001  0.289  1.0
[/CIF]
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The crystal structure described by RhAs2 crystallizes in the monoclinic P2_1/c space group. Rh(1) is bonded to three equivalent As(1) and three equivalent As(2) atoms to form RhAs6 octahedra that share corners with eight equivalent Rh(1)As6 octahedra, corners with three equivalent As(1)AsRh3 tetrahedra, corners with three equivalent As(2)AsRh3 tetrahedra, and edges with two equivalent Rh(1)As6 octahedra. The corner-sharing octahedral tilt angles range from 54-59°. There are two inequivalent As sites. In the first As site, As(1) is bonded to three equivalent Rh(1) and one As(2) atom to form AsAsRh3 tetrahedra that share corners with three equivalent Rh(1)As6 octahedra, corners with four equivalent As(1)AsRh3 tetrahedra, corners with nine equivalent As(2)AsRh3 tetrahedra, and  an edgeedge with one As(1)AsRh3 tetrahedra. The corner-sharing octahedral tilt angles range from 68-72°. In the second As site, As(2) is bonded to three equivalent Rh(1) and one As(1) atom to form distorted AsAsRh3 tetrahedra that share corners with three equivalent Rh(1)As6 octahedra, corners with four equivalent As(2)AsRh3 tetrahedra, corners with nine equivalent As(1)AsRh3 tetrahedra, and  an edgeedge with one As(2)AsRh3 tetrahedra. The corner-sharing octahedral tilt angles range from 73-78°. is represented by the Crystallographic Information File (CIF) [CIF]
data_As2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.088
_cell_length_b   6.103
_cell_length_c   6.179
_cell_angle_alpha   90.000
_cell_angle_beta   114.097
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   209.601
_cell_formula_units_Z   4
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
  As  As0  1  0.157  0.872  0.870  1.0
  As  As1  1  0.843  0.372  0.630  1.0
  As  As2  1  0.843  0.128  0.130  1.0
  As  As3  1  0.157  0.628  0.370  1.0
  As  As4  1  0.339  0.371  0.182  1.0
  As  As5  1  0.661  0.871  0.318  1.0
  As  As6  1  0.661  0.629  0.818  1.0
  As  As7  1  0.339  0.129  0.682  1.0
  Rh  Rh8  1  0.272  0.499  0.789  1.0
  Rh  Rh9  1  0.728  0.999  0.711  1.0
  Rh  Rh10  1  0.728  0.501  0.211  1.0
  Rh  Rh11  1  0.272  0.001  0.289  1.0
[/CIF]
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