The compound described by Rh2As is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded to four equivalent As(1) atoms to form a mixture of distorted edge and corner-sharing RhAs4 tetrahedra. In the second Rh site, Rh(1) is bonded in a 3-coordinate geometry to five equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Rh(2) and five equivalent Rh(1) atoms. is represented by the CIF file [CIF]
data_AsRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.004
_cell_length_b   5.847
_cell_length_c   7.525
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   176.169
_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  0.250  0.233  0.612  1.0
  As  As1  1  0.250  0.733  0.888  1.0
  As  As2  1  0.750  0.767  0.388  1.0
  As  As3  1  0.750  0.267  0.112  1.0
  Rh  Rh4  1  0.250  0.032  0.322  1.0
  Rh  Rh5  1  0.250  0.532  0.178  1.0
  Rh  Rh6  1  0.750  0.968  0.678  1.0
  Rh  Rh7  1  0.750  0.468  0.822  1.0
  Rh  Rh8  1  0.250  0.147  0.927  1.0
  Rh  Rh9  1  0.250  0.647  0.573  1.0
  Rh  Rh10  1  0.750  0.853  0.073  1.0
  Rh  Rh11  1  0.750  0.353  0.427  1.0
[/CIF]
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The compound described by Rh2As is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded to four equivalent As(1) atoms to form a mixture of distorted edge and corner-sharing RhAs4 tetrahedra. In the second Rh site, Rh(1) is bonded in a 3-coordinate geometry to five equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Rh(2) and five equivalent Rh(1) atoms. is represented by the CIF file [CIF]
data_AsRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.004
_cell_length_b   5.847
_cell_length_c   7.525
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   176.169
_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  0.250  0.233  0.612  1.0
  As  As1  1  0.250  0.733  0.888  1.0
  As  As2  1  0.750  0.767  0.388  1.0
  As  As3  1  0.750  0.267  0.112  1.0
  Rh  Rh4  1  0.250  0.032  0.322  1.0
  Rh  Rh5  1  0.250  0.532  0.178  1.0
  Rh  Rh6  1  0.750  0.968  0.678  1.0
  Rh  Rh7  1  0.750  0.468  0.822  1.0
  Rh  Rh8  1  0.250  0.147  0.927  1.0
  Rh  Rh9  1  0.250  0.647  0.573  1.0
  Rh  Rh10  1  0.750  0.853  0.073  1.0
  Rh  Rh11  1  0.750  0.353  0.427  1.0
[/CIF]
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