The structure described by Rb2As3 crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to four equivalent As(1) and four equivalent As(2) atoms to form a mixture of edge, face, and corner-sharing RbAs8 hexagonal bipyramids. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to two equivalent As(2) and eight equivalent As(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one As(1), and one As(2) atom. In the second As site, As(2) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), and two equivalent As(1) atoms. is represented by the CIF card [CIF]
data_Rb2As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.855
_cell_length_b   6.855
_cell_length_c   8.914
_cell_angle_alpha   110.128
_cell_angle_beta   110.128
_cell_angle_gamma   96.027
_symmetry_Int_Tables_number   1
_cell_volume   357.210
_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  0.750  0.250  0.500  1.0
  Rb  Rb1  1  0.250  0.750  0.500  1.0
  Rb  Rb2  1  0.263  0.737  0.000  1.0
  Rb  Rb3  1  0.737  0.263  0.000  1.0
  As  As4  1  0.696  0.696  0.843  1.0
  As  As5  1  0.852  0.852  0.157  1.0
  As  As6  1  0.304  0.304  0.157  1.0
  As  As7  1  0.148  0.148  0.843  1.0
  As  As8  1  0.843  0.843  0.686  1.0
  As  As9  1  0.157  0.157  0.314  1.0
[/CIF]
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The structure described by Rb2As3 crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to four equivalent As(1) and four equivalent As(2) atoms to form a mixture of edge, face, and corner-sharing RbAs8 hexagonal bipyramids. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to two equivalent As(2) and eight equivalent As(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Rb(1), four equivalent Rb(2), one As(1), and one As(2) atom. In the second As site, As(2) is bonded in a 8-coordinate geometry to two equivalent Rb(2), four equivalent Rb(1), and two equivalent As(1) atoms. is represented by the CIF card [CIF]
data_Rb2As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.855
_cell_length_b   6.855
_cell_length_c   8.914
_cell_angle_alpha   110.128
_cell_angle_beta   110.128
_cell_angle_gamma   96.027
_symmetry_Int_Tables_number   1
_cell_volume   357.210
_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  0.750  0.250  0.500  1.0
  Rb  Rb1  1  0.250  0.750  0.500  1.0
  Rb  Rb2  1  0.263  0.737  0.000  1.0
  Rb  Rb3  1  0.737  0.263  0.000  1.0
  As  As4  1  0.696  0.696  0.843  1.0
  As  As5  1  0.852  0.852  0.157  1.0
  As  As6  1  0.304  0.304  0.157  1.0
  As  As7  1  0.148  0.148  0.843  1.0
  As  As8  1  0.843  0.843  0.686  1.0
  As  As9  1  0.157  0.157  0.314  1.0
[/CIF]
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