The material described by ErRh7B4 crystallizes in the orthorhombic Pmm2 space group. Er(1) is bonded in a 20-coordinate geometry to two equivalent Er(1), four equivalent Rh(2), four equivalent Rh(3), four equivalent Rh(4), two equivalent B(1), and four equivalent B(2) atoms. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a square co-planar geometry to four equivalent Rh(5) and four equivalent B(1) atoms. In the second Rh site, Rh(2) is bonded in a distorted square co-planar geometry to four equivalent Er(1) and four equivalent B(2) atoms. In the third Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Er(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fourth Rh site, Rh(4) is bonded in a distorted square co-planar geometry to two equivalent Er(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fifth Rh site, Rh(5) is bonded in a 14-coordinate geometry to two equivalent Rh(5), four equivalent Rh(1), four equivalent Rh(3), and four equivalent Rh(4) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to one Er(1), two equivalent Rh(1), two equivalent Rh(3), and two equivalent Rh(4) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Er(1), two equivalent Rh(2), two equivalent Rh(3), and two equivalent Rh(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErB4Rh7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.911
_cell_length_b   5.547
_cell_length_c   9.622
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   155.363
_cell_formula_units_Z   1
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
  Er  Er0  1  0.000  1.000  0.000  1.0
  B  B1  1  0.000  1.000  0.334  1.0
  B  B2  1  0.000  0.500  0.833  1.0
  B  B3  1  0.000  0.500  0.167  1.0
  B  B4  1  0.000  1.000  0.666  1.0
  Rh  Rh5  1  0.500  0.006  0.500  1.0
  Rh  Rh6  1  0.500  0.504  0.000  1.0
  Rh  Rh7  1  0.500  0.248  0.248  1.0
  Rh  Rh8  1  0.500  0.747  0.747  1.0
  Rh  Rh9  1  0.500  0.747  0.253  1.0
  Rh  Rh10  1  0.500  0.248  0.752  1.0
  Rh  Rh11  1  0.000  0.500  0.500  1.0
[/CIF]
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The material described by ErRh7B4 crystallizes in the orthorhombic Pmm2 space group. Er(1) is bonded in a 20-coordinate geometry to two equivalent Er(1), four equivalent Rh(2), four equivalent Rh(3), four equivalent Rh(4), two equivalent B(1), and four equivalent B(2) atoms. There are five inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a square co-planar geometry to four equivalent Rh(5) and four equivalent B(1) atoms. In the second Rh site, Rh(2) is bonded in a distorted square co-planar geometry to four equivalent Er(1) and four equivalent B(2) atoms. In the third Rh site, Rh(3) is bonded in a distorted square co-planar geometry to two equivalent Er(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fourth Rh site, Rh(4) is bonded in a distorted square co-planar geometry to two equivalent Er(1), two equivalent Rh(5), two equivalent B(1), and two equivalent B(2) atoms. In the fifth Rh site, Rh(5) is bonded in a 14-coordinate geometry to two equivalent Rh(5), four equivalent Rh(1), four equivalent Rh(3), and four equivalent Rh(4) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to one Er(1), two equivalent Rh(1), two equivalent Rh(3), and two equivalent Rh(4) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to two equivalent Er(1), two equivalent Rh(2), two equivalent Rh(3), and two equivalent Rh(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErB4Rh7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.911
_cell_length_b   5.547
_cell_length_c   9.622
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   155.363
_cell_formula_units_Z   1
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
  Er  Er0  1  0.000  1.000  0.000  1.0
  B  B1  1  0.000  1.000  0.334  1.0
  B  B2  1  0.000  0.500  0.833  1.0
  B  B3  1  0.000  0.500  0.167  1.0
  B  B4  1  0.000  1.000  0.666  1.0
  Rh  Rh5  1  0.500  0.006  0.500  1.0
  Rh  Rh6  1  0.500  0.504  0.000  1.0
  Rh  Rh7  1  0.500  0.248  0.248  1.0
  Rh  Rh8  1  0.500  0.747  0.747  1.0
  Rh  Rh9  1  0.500  0.747  0.253  1.0
  Rh  Rh10  1  0.500  0.248  0.752  1.0
  Rh  Rh11  1  0.000  0.500  0.500  1.0
[/CIF]
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