The compound described by Rb2ZnBr4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent Br(1), three equivalent Br(3), and four equivalent Br(2) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Br(3), three equivalent Br(1), and four equivalent Br(2) atoms. Zn(1) is bonded in a tetrahedral geometry to one Br(1), one Br(3), and two equivalent Br(2) atoms. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one Zn(1) atom. In the second Br site, Br(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Zn(1) atom. In the third Br site, Br(3) is bonded in a 5-coordinate geometry to one Rb(2), three equivalent Rb(1), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2ZnBr4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.617
_cell_length_b   9.747
_cell_length_c   13.449
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   998.456
_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  0.250  0.482  0.673  1.0
  Rb  Rb1  1  0.750  0.378  0.921  1.0
  Rb  Rb2  1  0.750  0.878  0.579  1.0
  Rb  Rb3  1  0.250  0.122  0.421  1.0
  Rb  Rb4  1  0.250  0.622  0.079  1.0
  Rb  Rb5  1  0.750  0.018  0.173  1.0
  Rb  Rb6  1  0.750  0.518  0.327  1.0
  Rb  Rb7  1  0.250  0.982  0.827  1.0
  Zn  Zn8  1  0.250  0.225  0.077  1.0
  Zn  Zn9  1  0.750  0.275  0.577  1.0
  Zn  Zn10  1  0.250  0.725  0.423  1.0
  Zn  Zn11  1  0.750  0.775  0.923  1.0
  Br  Br12  1  0.250  0.815  0.591  1.0
  Br  Br13  1  0.506  0.823  0.346  1.0
  Br  Br14  1  0.506  0.323  0.154  1.0
  Br  Br15  1  0.494  0.177  0.654  1.0
  Br  Br16  1  0.994  0.823  0.346  1.0
  Br  Br17  1  0.250  0.480  0.412  1.0
  Br  Br18  1  0.750  0.020  0.912  1.0
  Br  Br19  1  0.994  0.323  0.154  1.0
  Br  Br20  1  0.250  0.980  0.088  1.0
  Br  Br21  1  0.750  0.185  0.409  1.0
  Br  Br22  1  0.006  0.677  0.846  1.0
  Br  Br23  1  0.250  0.315  0.909  1.0
  Br  Br24  1  0.750  0.685  0.091  1.0
  Br  Br25  1  0.006  0.177  0.654  1.0
  Br  Br26  1  0.750  0.520  0.588  1.0
  Br  Br27  1  0.494  0.677  0.846  1.0
[/CIF]
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The compound described by Rb2ZnBr4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent Br(1), three equivalent Br(3), and four equivalent Br(2) atoms. In the second Rb site, Rb(2) is bonded in a 8-coordinate geometry to one Br(3), three equivalent Br(1), and four equivalent Br(2) atoms. Zn(1) is bonded in a tetrahedral geometry to one Br(1), one Br(3), and two equivalent Br(2) atoms. There are three inequivalent Br sites. In the first Br site, Br(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one Zn(1) atom. In the second Br site, Br(2) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one Zn(1) atom. In the third Br site, Br(3) is bonded in a 5-coordinate geometry to one Rb(2), three equivalent Rb(1), and one Zn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2ZnBr4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.617
_cell_length_b   9.747
_cell_length_c   13.449
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   998.456
_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  0.250  0.482  0.673  1.0
  Rb  Rb1  1  0.750  0.378  0.921  1.0
  Rb  Rb2  1  0.750  0.878  0.579  1.0
  Rb  Rb3  1  0.250  0.122  0.421  1.0
  Rb  Rb4  1  0.250  0.622  0.079  1.0
  Rb  Rb5  1  0.750  0.018  0.173  1.0
  Rb  Rb6  1  0.750  0.518  0.327  1.0
  Rb  Rb7  1  0.250  0.982  0.827  1.0
  Zn  Zn8  1  0.250  0.225  0.077  1.0
  Zn  Zn9  1  0.750  0.275  0.577  1.0
  Zn  Zn10  1  0.250  0.725  0.423  1.0
  Zn  Zn11  1  0.750  0.775  0.923  1.0
  Br  Br12  1  0.250  0.815  0.591  1.0
  Br  Br13  1  0.506  0.823  0.346  1.0
  Br  Br14  1  0.506  0.323  0.154  1.0
  Br  Br15  1  0.494  0.177  0.654  1.0
  Br  Br16  1  0.994  0.823  0.346  1.0
  Br  Br17  1  0.250  0.480  0.412  1.0
  Br  Br18  1  0.750  0.020  0.912  1.0
  Br  Br19  1  0.994  0.323  0.154  1.0
  Br  Br20  1  0.250  0.980  0.088  1.0
  Br  Br21  1  0.750  0.185  0.409  1.0
  Br  Br22  1  0.006  0.677  0.846  1.0
  Br  Br23  1  0.250  0.315  0.909  1.0
  Br  Br24  1  0.750  0.685  0.091  1.0
  Br  Br25  1  0.006  0.177  0.654  1.0
  Br  Br26  1  0.750  0.520  0.588  1.0
  Br  Br27  1  0.494  0.677  0.846  1.0
[/CIF]
.