The material structure described by Yb2Cu4As3 crystallizes in the hexagonal P-62m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 13-coordinate geometry to two equivalent Cu(2), two equivalent Cu(4), four equivalent Cu(1), one As(1), and four equivalent As(2) atoms. In the second Yb site, Yb(2) is bonded in a 16-coordinate geometry to two equivalent Cu(1), two equivalent Cu(3), two equivalent Cu(4), four equivalent Cu(2), two equivalent As(1), and four equivalent As(3) atoms. In the third Yb site, Yb(3) is bonded in a 15-coordinate geometry to three equivalent Cu(2), six equivalent Cu(1), and six equivalent As(2) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one Yb(2), two equivalent Yb(1), two equivalent Yb(3), two equivalent As(1), and two equivalent As(2) atoms. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one Yb(1), one Yb(3), two equivalent Yb(2), one As(1), one As(3), and two equivalent As(2) atoms. In the third Cu site, Cu(3) is bonded in a distorted trigonal planar geometry to six equivalent Yb(2) and three equivalent As(3) atoms. In the fourth Cu site, Cu(4) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent As(2), and two equivalent As(3) atoms. There are three inequivalent As sites. In the first As site, As(3) is bonded in a 9-coordinate geometry to four equivalent Yb(2), one Cu(3), two equivalent Cu(2), and two equivalent Cu(4) atoms. In the second As site, As(1) is bonded in a 9-coordinate geometry to one Yb(1), two equivalent Yb(2), two equivalent Cu(2), and four equivalent Cu(1) atoms. In the third As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(3), one Cu(4), two equivalent Cu(1), and two equivalent Cu(2) atoms. is represented by the CIF file [CIF]
data_Yb2Cu4As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.079
_cell_length_b   13.080
_cell_length_c   4.042
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.996
_symmetry_Int_Tables_number   1
_cell_volume   598.928
_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
  Yb  Yb0  1  0.000  0.571  0.000  1.0
  Yb  Yb1  1  0.429  0.429  1.000  1.0
  Yb  Yb2  1  0.571  0.000  1.000  1.0
  Yb  Yb3  1  1.000  0.189  0.500  1.0
  Yb  Yb4  1  0.811  0.811  0.500  1.0
  Yb  Yb5  1  0.189  1.000  0.500  1.0
  Yb  Yb6  1  0.667  0.333  0.000  1.0
  Yb  Yb7  1  0.333  0.667  1.000  1.0
  Cu  Cu8  1  0.118  0.482  0.500  1.0
  Cu  Cu9  1  0.482  0.118  0.500  1.0
  Cu  Cu10  1  0.882  0.364  0.500  1.0
  Cu  Cu11  1  0.636  0.518  0.500  1.0
  Cu  Cu12  1  0.518  0.636  0.500  1.0
  Cu  Cu13  1  0.364  0.882  0.500  1.0
  Cu  Cu14  1  0.375  0.190  0.000  1.0
  Cu  Cu15  1  0.810  0.185  0.000  1.0
  Cu  Cu16  1  0.000  1.000  0.000  1.0
  Cu  Cu17  1  0.725  1.000  0.500  1.0
  Cu  Cu18  1  0.275  0.275  0.500  1.0
  Cu  Cu19  1  0.000  0.725  0.500  1.0
  Cu  Cu20  1  0.190  0.375  0.000  1.0
  Cu  Cu21  1  0.185  0.810  1.000  1.0
  Cu  Cu22  1  0.625  0.815  1.000  1.0
  Cu  Cu23  1  0.815  0.625  1.000  1.0
  As  As24  1  0.642  0.642  1.000  1.0
  As  As25  1  1.000  0.358  0.000  1.0
  As  As26  1  0.481  0.306  0.500  1.0
  As  As27  1  0.306  0.481  0.500  1.0
  As  As28  1  0.176  0.694  0.500  1.0
  As  As29  1  0.519  0.824  0.500  1.0
  As  As30  1  0.824  0.519  0.500  1.0
  As  As31  1  0.694  0.176  0.500  1.0
  As  As32  1  0.823  1.000  0.000  1.0
  As  As33  1  0.177  0.177  1.000  1.0
  As  As34  1  1.000  0.823  0.000  1.0
  As  As35  1  0.358  1.000  1.000  1.0
[/CIF]
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The material structure described by Yb2Cu4As3 crystallizes in the hexagonal P-62m space group. There are three inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 13-coordinate geometry to two equivalent Cu(2), two equivalent Cu(4), four equivalent Cu(1), one As(1), and four equivalent As(2) atoms. In the second Yb site, Yb(2) is bonded in a 16-coordinate geometry to two equivalent Cu(1), two equivalent Cu(3), two equivalent Cu(4), four equivalent Cu(2), two equivalent As(1), and four equivalent As(3) atoms. In the third Yb site, Yb(3) is bonded in a 15-coordinate geometry to three equivalent Cu(2), six equivalent Cu(1), and six equivalent As(2) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one Yb(2), two equivalent Yb(1), two equivalent Yb(3), two equivalent As(1), and two equivalent As(2) atoms. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one Yb(1), one Yb(3), two equivalent Yb(2), one As(1), one As(3), and two equivalent As(2) atoms. In the third Cu site, Cu(3) is bonded in a distorted trigonal planar geometry to six equivalent Yb(2) and three equivalent As(3) atoms. In the fourth Cu site, Cu(4) is bonded in a 8-coordinate geometry to two equivalent Yb(1), two equivalent Yb(2), two equivalent As(2), and two equivalent As(3) atoms. There are three inequivalent As sites. In the first As site, As(3) is bonded in a 9-coordinate geometry to four equivalent Yb(2), one Cu(3), two equivalent Cu(2), and two equivalent Cu(4) atoms. In the second As site, As(1) is bonded in a 9-coordinate geometry to one Yb(1), two equivalent Yb(2), two equivalent Cu(2), and four equivalent Cu(1) atoms. In the third As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Yb(1), two equivalent Yb(3), one Cu(4), two equivalent Cu(1), and two equivalent Cu(2) atoms. is represented by the CIF file [CIF]
data_Yb2Cu4As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.079
_cell_length_b   13.080
_cell_length_c   4.042
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.996
_symmetry_Int_Tables_number   1
_cell_volume   598.928
_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
  Yb  Yb0  1  0.000  0.571  0.000  1.0
  Yb  Yb1  1  0.429  0.429  1.000  1.0
  Yb  Yb2  1  0.571  0.000  1.000  1.0
  Yb  Yb3  1  1.000  0.189  0.500  1.0
  Yb  Yb4  1  0.811  0.811  0.500  1.0
  Yb  Yb5  1  0.189  1.000  0.500  1.0
  Yb  Yb6  1  0.667  0.333  0.000  1.0
  Yb  Yb7  1  0.333  0.667  1.000  1.0
  Cu  Cu8  1  0.118  0.482  0.500  1.0
  Cu  Cu9  1  0.482  0.118  0.500  1.0
  Cu  Cu10  1  0.882  0.364  0.500  1.0
  Cu  Cu11  1  0.636  0.518  0.500  1.0
  Cu  Cu12  1  0.518  0.636  0.500  1.0
  Cu  Cu13  1  0.364  0.882  0.500  1.0
  Cu  Cu14  1  0.375  0.190  0.000  1.0
  Cu  Cu15  1  0.810  0.185  0.000  1.0
  Cu  Cu16  1  0.000  1.000  0.000  1.0
  Cu  Cu17  1  0.725  1.000  0.500  1.0
  Cu  Cu18  1  0.275  0.275  0.500  1.0
  Cu  Cu19  1  0.000  0.725  0.500  1.0
  Cu  Cu20  1  0.190  0.375  0.000  1.0
  Cu  Cu21  1  0.185  0.810  1.000  1.0
  Cu  Cu22  1  0.625  0.815  1.000  1.0
  Cu  Cu23  1  0.815  0.625  1.000  1.0
  As  As24  1  0.642  0.642  1.000  1.0
  As  As25  1  1.000  0.358  0.000  1.0
  As  As26  1  0.481  0.306  0.500  1.0
  As  As27  1  0.306  0.481  0.500  1.0
  As  As28  1  0.176  0.694  0.500  1.0
  As  As29  1  0.519  0.824  0.500  1.0
  As  As30  1  0.824  0.519  0.500  1.0
  As  As31  1  0.694  0.176  0.500  1.0
  As  As32  1  0.823  1.000  0.000  1.0
  As  As33  1  0.177  0.177  1.000  1.0
  As  As34  1  1.000  0.823  0.000  1.0
  As  As35  1  0.358  1.000  1.000  1.0
[/CIF]
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