The crystal structure described by Rb5SiAs3 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one As(1), two equivalent As(3), and three equivalent As(2) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to two equivalent Si(1), one As(1), two equivalent As(2), and two equivalent As(3) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. In the fourth Rb site, Rb(4) is bonded to one As(2), one As(3), and two equivalent As(1) atoms to form distorted corner-sharing RbAs4 tetrahedra. In the fifth Rb site, Rb(5) is bonded in a 7-coordinate geometry to two equivalent Si(1), two equivalent As(3), and three equivalent As(1) atoms. Si(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(2), two equivalent Rb(5), one As(1), one As(2), and one As(3) atom. There are three inequivalent As sites. In the first As site, As(3) is bonded in a 1-coordinate geometry to one Rb(4), two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(5), and one Si(1) atom. In the second As site, As(1) is bonded in a 10-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(3), two equivalent Rb(4), three equivalent Rb(5), and one Si(1) atom. In the third As site, As(2) is bonded in a 10-coordinate geometry to one Rb(4), two equivalent Rb(2), three equivalent Rb(1), three equivalent Rb(3), and one Si(1) atom. is represented by the CIF file [CIF]
data_Rb5SiAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.668
_cell_length_b   14.231
_cell_length_c   15.624
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1260.338
_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
  Rb  Rb0  1  0.750  0.446  0.148  1.0
  Rb  Rb1  1  0.250  0.554  0.852  1.0
  Rb  Rb2  1  0.750  0.946  0.352  1.0
  Rb  Rb3  1  0.250  0.054  0.648  1.0
  Rb  Rb4  1  0.250  0.280  0.785  1.0
  Rb  Rb5  1  0.750  0.720  0.215  1.0
  Rb  Rb6  1  0.250  0.780  0.715  1.0
  Rb  Rb7  1  0.750  0.220  0.285  1.0
  Rb  Rb8  1  0.250  0.853  0.458  1.0
  Rb  Rb9  1  0.750  0.147  0.542  1.0
  Rb  Rb10  1  0.250  0.353  0.042  1.0
  Rb  Rb11  1  0.750  0.647  0.958  1.0
  Rb  Rb12  1  0.250  0.615  0.319  1.0
  Rb  Rb13  1  0.750  0.385  0.681  1.0
  Rb  Rb14  1  0.250  0.115  0.181  1.0
  Rb  Rb15  1  0.750  0.885  0.819  1.0
  Rb  Rb16  1  0.250  0.568  0.556  1.0
  Rb  Rb17  1  0.750  0.432  0.444  1.0
  Rb  Rb18  1  0.250  0.068  0.944  1.0
  Rb  Rb19  1  0.750  0.932  0.056  1.0
  Si  Si20  1  0.750  0.239  0.924  1.0
  Si  Si21  1  0.250  0.761  0.076  1.0
  Si  Si22  1  0.750  0.739  0.576  1.0
  Si  Si23  1  0.250  0.261  0.424  1.0
  As  As24  1  0.250  0.313  0.563  1.0
  As  As25  1  0.750  0.687  0.437  1.0
  As  As26  1  0.250  0.813  0.937  1.0
  As  As27  1  0.750  0.187  0.063  1.0
  As  As28  1  0.250  0.102  0.403  1.0
  As  As29  1  0.750  0.898  0.597  1.0
  As  As30  1  0.250  0.602  0.097  1.0
  As  As31  1  0.750  0.398  0.903  1.0
  As  As32  1  0.750  0.135  0.811  1.0
  As  As33  1  0.250  0.865  0.189  1.0
  As  As34  1  0.750  0.635  0.689  1.0
  As  As35  1  0.250  0.365  0.311  1.0
[/CIF]
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The crystal structure described by Rb5SiAs3 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one As(1), two equivalent As(3), and three equivalent As(2) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to two equivalent Si(1), one As(1), two equivalent As(2), and two equivalent As(3) atoms. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to two equivalent As(1) and three equivalent As(2) atoms. In the fourth Rb site, Rb(4) is bonded to one As(2), one As(3), and two equivalent As(1) atoms to form distorted corner-sharing RbAs4 tetrahedra. In the fifth Rb site, Rb(5) is bonded in a 7-coordinate geometry to two equivalent Si(1), two equivalent As(3), and three equivalent As(1) atoms. Si(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(2), two equivalent Rb(5), one As(1), one As(2), and one As(3) atom. There are three inequivalent As sites. In the first As site, As(3) is bonded in a 1-coordinate geometry to one Rb(4), two equivalent Rb(1), two equivalent Rb(2), two equivalent Rb(5), and one Si(1) atom. In the second As site, As(1) is bonded in a 10-coordinate geometry to one Rb(1), one Rb(2), two equivalent Rb(3), two equivalent Rb(4), three equivalent Rb(5), and one Si(1) atom. In the third As site, As(2) is bonded in a 10-coordinate geometry to one Rb(4), two equivalent Rb(2), three equivalent Rb(1), three equivalent Rb(3), and one Si(1) atom. is represented by the CIF file [CIF]
data_Rb5SiAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.668
_cell_length_b   14.231
_cell_length_c   15.624
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1260.338
_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
  Rb  Rb0  1  0.750  0.446  0.148  1.0
  Rb  Rb1  1  0.250  0.554  0.852  1.0
  Rb  Rb2  1  0.750  0.946  0.352  1.0
  Rb  Rb3  1  0.250  0.054  0.648  1.0
  Rb  Rb4  1  0.250  0.280  0.785  1.0
  Rb  Rb5  1  0.750  0.720  0.215  1.0
  Rb  Rb6  1  0.250  0.780  0.715  1.0
  Rb  Rb7  1  0.750  0.220  0.285  1.0
  Rb  Rb8  1  0.250  0.853  0.458  1.0
  Rb  Rb9  1  0.750  0.147  0.542  1.0
  Rb  Rb10  1  0.250  0.353  0.042  1.0
  Rb  Rb11  1  0.750  0.647  0.958  1.0
  Rb  Rb12  1  0.250  0.615  0.319  1.0
  Rb  Rb13  1  0.750  0.385  0.681  1.0
  Rb  Rb14  1  0.250  0.115  0.181  1.0
  Rb  Rb15  1  0.750  0.885  0.819  1.0
  Rb  Rb16  1  0.250  0.568  0.556  1.0
  Rb  Rb17  1  0.750  0.432  0.444  1.0
  Rb  Rb18  1  0.250  0.068  0.944  1.0
  Rb  Rb19  1  0.750  0.932  0.056  1.0
  Si  Si20  1  0.750  0.239  0.924  1.0
  Si  Si21  1  0.250  0.761  0.076  1.0
  Si  Si22  1  0.750  0.739  0.576  1.0
  Si  Si23  1  0.250  0.261  0.424  1.0
  As  As24  1  0.250  0.313  0.563  1.0
  As  As25  1  0.750  0.687  0.437  1.0
  As  As26  1  0.250  0.813  0.937  1.0
  As  As27  1  0.750  0.187  0.063  1.0
  As  As28  1  0.250  0.102  0.403  1.0
  As  As29  1  0.750  0.898  0.597  1.0
  As  As30  1  0.250  0.602  0.097  1.0
  As  As31  1  0.750  0.398  0.903  1.0
  As  As32  1  0.750  0.135  0.811  1.0
  As  As33  1  0.250  0.865  0.189  1.0
  As  As34  1  0.750  0.635  0.689  1.0
  As  As35  1  0.250  0.365  0.311  1.0
[/CIF]
.