The material described by Eu2Cu6P5 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent P(2), and four equivalent P(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Eu(1), two equivalent P(1), and two equivalent P(2) atoms to form distorted CuEu2P4 tetrahedra that share corners with six equivalent Cu(2)Eu4P4 tetrahedra, corners with eight equivalent Cu(1)Eu2P4 tetrahedra,  an edgeedge with one Cu(2)Eu4P4 tetrahedra, edges with three equivalent Cu(1)Eu2P4 tetrahedra, and faces with four equivalent Cu(1)Eu2P4 tetrahedra. In the second Cu site, Cu(2) is bonded to four equivalent Eu(1) and four equivalent P(3) atoms to form distorted CuEu4P4 tetrahedra that share corners with twelve equivalent Cu(1)Eu2P4 tetrahedra, edges with two equivalent Cu(1)Eu2P4 tetrahedra, edges with four equivalent Cu(2)Eu4P4 tetrahedra, and faces with four equivalent Cu(2)Eu4P4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Cu(1), and one P(3) atom. In the third P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Cu(2), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Cu6P5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.707
_cell_length_b   12.707
_cell_length_c   12.707
_cell_angle_alpha   161.639
_cell_angle_beta   161.639
_cell_angle_gamma   26.080
_symmetry_Int_Tables_number   1
_cell_volume   203.509
_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
  Eu  Eu0  1  0.649  0.649  0.000  1.0
  Eu  Eu1  1  0.351  0.351  0.000  1.0
  Cu  Cu2  1  0.447  0.947  0.500  1.0
  Cu  Cu3  1  0.947  0.447  0.500  1.0
  Cu  Cu4  1  0.553  0.053  0.500  1.0
  Cu  Cu5  1  0.053  0.553  0.500  1.0
  Cu  Cu6  1  0.750  0.250  0.500  1.0
  Cu  Cu7  1  0.250  0.750  0.500  1.0
  P  P8  1  0.500  0.500  0.000  1.0
  P  P9  1  0.895  0.895  0.000  1.0
  P  P10  1  0.105  0.105  0.000  1.0
  P  P11  1  0.802  0.802  0.000  1.0
  P  P12  1  0.198  0.198  0.000  1.0
[/CIF]
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The material described by Eu2Cu6P5 crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent P(2), and four equivalent P(3) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Eu(1), two equivalent P(1), and two equivalent P(2) atoms to form distorted CuEu2P4 tetrahedra that share corners with six equivalent Cu(2)Eu4P4 tetrahedra, corners with eight equivalent Cu(1)Eu2P4 tetrahedra,  an edgeedge with one Cu(2)Eu4P4 tetrahedra, edges with three equivalent Cu(1)Eu2P4 tetrahedra, and faces with four equivalent Cu(1)Eu2P4 tetrahedra. In the second Cu site, Cu(2) is bonded to four equivalent Eu(1) and four equivalent P(3) atoms to form distorted CuEu4P4 tetrahedra that share corners with twelve equivalent Cu(1)Eu2P4 tetrahedra, edges with two equivalent Cu(1)Eu2P4 tetrahedra, edges with four equivalent Cu(2)Eu4P4 tetrahedra, and faces with four equivalent Cu(2)Eu4P4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second P site, P(2) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Cu(1), and one P(3) atom. In the third P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Eu(1), four equivalent Cu(2), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Cu6P5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.707
_cell_length_b   12.707
_cell_length_c   12.707
_cell_angle_alpha   161.639
_cell_angle_beta   161.639
_cell_angle_gamma   26.080
_symmetry_Int_Tables_number   1
_cell_volume   203.509
_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
  Eu  Eu0  1  0.649  0.649  0.000  1.0
  Eu  Eu1  1  0.351  0.351  0.000  1.0
  Cu  Cu2  1  0.447  0.947  0.500  1.0
  Cu  Cu3  1  0.947  0.447  0.500  1.0
  Cu  Cu4  1  0.553  0.053  0.500  1.0
  Cu  Cu5  1  0.053  0.553  0.500  1.0
  Cu  Cu6  1  0.750  0.250  0.500  1.0
  Cu  Cu7  1  0.250  0.750  0.500  1.0
  P  P8  1  0.500  0.500  0.000  1.0
  P  P9  1  0.895  0.895  0.000  1.0
  P  P10  1  0.105  0.105  0.000  1.0
  P  P11  1  0.802  0.802  0.000  1.0
  P  P12  1  0.198  0.198  0.000  1.0
[/CIF]
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