The material structure described by Er12Ga9Ge11 crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Er sites. In the first Er site, Er(1) is bonded in a 9-coordinate geometry to one Ga(5), two equivalent Ga(1), two equivalent Ga(4), and four equivalent Ge(1) atoms. In the second Er site, Er(2) is bonded in a 9-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), one Ge(4), and four equivalent Ge(2) atoms. In the third Er site, Er(3) is bonded in a 9-coordinate geometry to one Ga(1), one Ga(2), one Ga(3), one Ga(4), one Ge(5), and four equivalent Ge(3) atoms. In the fourth Er site, Er(4) is bonded in a 10-coordinate geometry to one Ga(5), two equivalent Ga(1), two equivalent Ga(4), one Ge(5), two equivalent Ge(1), and two equivalent Ge(3) atoms. In the fifth Er site, Er(5) is bonded in a 10-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), one Ge(4), one Ge(5), two equivalent Ge(2), and two equivalent Ge(3) atoms. There are five inequivalent Ga sites. In the first Ga site, Ga(5) is bonded in a 9-coordinate geometry to one Er(1), four equivalent Er(4), two equivalent Ga(1), and two equivalent Ge(1) atoms. In the second Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Er(1), one Er(3), four equivalent Er(4), one Ga(4), one Ga(5), and two equivalent Ge(1) atoms. In the third Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Er(2), one Er(3), four equivalent Er(5), one Ga(3), one Ge(4), and two equivalent Ge(2) atoms. In the fourth Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Er(2), one Er(3), four equivalent Er(5), one Ga(2), one Ge(5), and two equivalent Ge(3) atoms. In the fifth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Er(1), one Er(3), four equivalent Er(4), one Ga(1), one Ge(5), and two equivalent Ge(3) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(4), one Ga(5), and two equivalent Ga(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(2), four equivalent Er(5), two equivalent Ga(2), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Er(3), two equivalent Er(4), two equivalent Er(5), one Ga(3), one Ga(4), and one Ge(5) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(5), two equivalent Ga(2), and two equivalent Ge(2) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to one Er(3), two equivalent Er(4), two equivalent Er(5), one Ga(3), one Ga(4), and two equivalent Ge(3) atoms. is represented by the CIF file [CIF]
data_Er12Ga9Ge11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.935
_cell_length_b   5.935
_cell_length_c   18.735
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   102.856
_symmetry_Int_Tables_number   1
_cell_volume   643.450
_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  0.657  0.657  0.000  1.0
  Er  Er1  1  0.660  0.660  0.500  1.0
  Er  Er2  1  0.342  0.342  0.249  1.0
  Er  Er3  1  0.342  0.342  0.751  1.0
  Er  Er4  1  0.199  0.801  0.125  1.0
  Er  Er5  1  0.199  0.803  0.625  1.0
  Er  Er6  1  0.199  0.801  0.875  1.0
  Er  Er7  1  0.199  0.803  0.375  1.0
  Er  Er8  1  0.801  0.199  0.125  1.0
  Er  Er9  1  0.803  0.199  0.625  1.0
  Er  Er10  1  0.803  0.199  0.375  1.0
  Er  Er11  1  0.801  0.199  0.875  1.0
  Ga  Ga12  1  0.317  0.317  0.902  1.0
  Ga  Ga13  1  0.325  0.325  0.400  1.0
  Ga  Ga14  1  0.676  0.676  0.350  1.0
  Ga  Ga15  1  0.677  0.677  0.850  1.0
  Ga  Ga16  1  0.317  0.317  0.098  1.0
  Ga  Ga17  1  0.325  0.325  0.600  1.0
  Ga  Ga18  1  0.677  0.677  0.150  1.0
  Ga  Ga19  1  0.676  0.676  0.650  1.0
  Ga  Ga20  1  0.045  0.045  0.000  1.0
  Ge  Ge21  1  0.497  0.094  0.000  1.0
  Ge  Ge22  1  0.497  0.097  0.500  1.0
  Ge  Ge23  1  0.905  0.505  0.250  1.0
  Ge  Ge24  1  0.905  0.505  0.750  1.0
  Ge  Ge25  1  0.505  0.905  0.250  1.0
  Ge  Ge26  1  0.505  0.905  0.750  1.0
  Ge  Ge27  1  0.094  0.497  0.000  1.0
  Ge  Ge28  1  0.097  0.497  0.500  1.0
  Ge  Ge29  1  0.048  0.048  0.500  1.0
  Ge  Ge30  1  0.954  0.954  0.250  1.0
  Ge  Ge31  1  0.954  0.954  0.750  1.0
[/CIF]
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The material structure described by Er12Ga9Ge11 crystallizes in the orthorhombic Amm2 space group. There are five inequivalent Er sites. In the first Er site, Er(1) is bonded in a 9-coordinate geometry to one Ga(5), two equivalent Ga(1), two equivalent Ga(4), and four equivalent Ge(1) atoms. In the second Er site, Er(2) is bonded in a 9-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), one Ge(4), and four equivalent Ge(2) atoms. In the third Er site, Er(3) is bonded in a 9-coordinate geometry to one Ga(1), one Ga(2), one Ga(3), one Ga(4), one Ge(5), and four equivalent Ge(3) atoms. In the fourth Er site, Er(4) is bonded in a 10-coordinate geometry to one Ga(5), two equivalent Ga(1), two equivalent Ga(4), one Ge(5), two equivalent Ge(1), and two equivalent Ge(3) atoms. In the fifth Er site, Er(5) is bonded in a 10-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), one Ge(4), one Ge(5), two equivalent Ge(2), and two equivalent Ge(3) atoms. There are five inequivalent Ga sites. In the first Ga site, Ga(5) is bonded in a 9-coordinate geometry to one Er(1), four equivalent Er(4), two equivalent Ga(1), and two equivalent Ge(1) atoms. In the second Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Er(1), one Er(3), four equivalent Er(4), one Ga(4), one Ga(5), and two equivalent Ge(1) atoms. In the third Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Er(2), one Er(3), four equivalent Er(5), one Ga(3), one Ge(4), and two equivalent Ge(2) atoms. In the fourth Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Er(2), one Er(3), four equivalent Er(5), one Ga(2), one Ge(5), and two equivalent Ge(3) atoms. In the fifth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Er(1), one Er(3), four equivalent Er(4), one Ga(1), one Ge(5), and two equivalent Ge(3) atoms. There are five inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(4), one Ga(5), and two equivalent Ga(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(2), four equivalent Er(5), two equivalent Ga(2), and one Ge(4) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Er(3), two equivalent Er(4), two equivalent Er(5), one Ga(3), one Ga(4), and one Ge(5) atom. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to one Er(2), four equivalent Er(5), two equivalent Ga(2), and two equivalent Ge(2) atoms. In the fifth Ge site, Ge(5) is bonded in a 9-coordinate geometry to one Er(3), two equivalent Er(4), two equivalent Er(5), one Ga(3), one Ga(4), and two equivalent Ge(3) atoms. is represented by the CIF file [CIF]
data_Er12Ga9Ge11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.935
_cell_length_b   5.935
_cell_length_c   18.735
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   102.856
_symmetry_Int_Tables_number   1
_cell_volume   643.450
_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  0.657  0.657  0.000  1.0
  Er  Er1  1  0.660  0.660  0.500  1.0
  Er  Er2  1  0.342  0.342  0.249  1.0
  Er  Er3  1  0.342  0.342  0.751  1.0
  Er  Er4  1  0.199  0.801  0.125  1.0
  Er  Er5  1  0.199  0.803  0.625  1.0
  Er  Er6  1  0.199  0.801  0.875  1.0
  Er  Er7  1  0.199  0.803  0.375  1.0
  Er  Er8  1  0.801  0.199  0.125  1.0
  Er  Er9  1  0.803  0.199  0.625  1.0
  Er  Er10  1  0.803  0.199  0.375  1.0
  Er  Er11  1  0.801  0.199  0.875  1.0
  Ga  Ga12  1  0.317  0.317  0.902  1.0
  Ga  Ga13  1  0.325  0.325  0.400  1.0
  Ga  Ga14  1  0.676  0.676  0.350  1.0
  Ga  Ga15  1  0.677  0.677  0.850  1.0
  Ga  Ga16  1  0.317  0.317  0.098  1.0
  Ga  Ga17  1  0.325  0.325  0.600  1.0
  Ga  Ga18  1  0.677  0.677  0.150  1.0
  Ga  Ga19  1  0.676  0.676  0.650  1.0
  Ga  Ga20  1  0.045  0.045  0.000  1.0
  Ge  Ge21  1  0.497  0.094  0.000  1.0
  Ge  Ge22  1  0.497  0.097  0.500  1.0
  Ge  Ge23  1  0.905  0.505  0.250  1.0
  Ge  Ge24  1  0.905  0.505  0.750  1.0
  Ge  Ge25  1  0.505  0.905  0.250  1.0
  Ge  Ge26  1  0.505  0.905  0.750  1.0
  Ge  Ge27  1  0.094  0.497  0.000  1.0
  Ge  Ge28  1  0.097  0.497  0.500  1.0
  Ge  Ge29  1  0.048  0.048  0.500  1.0
  Ge  Ge30  1  0.954  0.954  0.250  1.0
  Ge  Ge31  1  0.954  0.954  0.750  1.0
[/CIF]
.