The material described by Rb2NiAs2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1) and six equivalent As(1) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1) and four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), two equivalent Ni(1), and one As(1) atom. is represented by the CIF file [CIF]
data_Rb2NiAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.928
_cell_length_b   7.928
_cell_length_c   5.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   128.457
_symmetry_Int_Tables_number   1
_cell_volume   291.023
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.792  0.208  0.250  1.0
  Rb  Rb1  1  0.208  0.792  0.750  1.0
  Rb  Rb2  1  0.409  0.591  0.250  1.0
  Rb  Rb3  1  0.591  0.409  0.750  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.000  0.000  0.500  1.0
  As  As6  1  0.920  0.729  0.250  1.0
  As  As7  1  0.080  0.271  0.750  1.0
  As  As8  1  0.271  0.080  0.250  1.0
  As  As9  1  0.729  0.920  0.750  1.0
[/CIF]
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The material described by Rb2NiAs2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1) and six equivalent As(1) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to six equivalent As(1) atoms. Ni(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1) and four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to three equivalent Rb(1), three equivalent Rb(2), two equivalent Ni(1), and one As(1) atom. is represented by the CIF file [CIF]
data_Rb2NiAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.928
_cell_length_b   7.928
_cell_length_c   5.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   128.457
_symmetry_Int_Tables_number   1
_cell_volume   291.023
_cell_formula_units_Z   2
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
  Rb  Rb0  1  0.792  0.208  0.250  1.0
  Rb  Rb1  1  0.208  0.792  0.750  1.0
  Rb  Rb2  1  0.409  0.591  0.250  1.0
  Rb  Rb3  1  0.591  0.409  0.750  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.000  0.000  0.500  1.0
  As  As6  1  0.920  0.729  0.250  1.0
  As  As7  1  0.080  0.271  0.750  1.0
  As  As8  1  0.271  0.080  0.250  1.0
  As  As9  1  0.729  0.920  0.750  1.0
[/CIF]
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