The structure described by Eu3(GaP2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to two equivalent P(2) and four equivalent P(1) atoms. In the second Eu site, Eu(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form distorted EuP6 octahedra that share corners with four equivalent Ga(1)P4 tetrahedra, edges with two equivalent Eu(2)P6 octahedra, and edges with four equivalent Ga(1)P4 tetrahedra. Ga(1) is bonded to two equivalent P(1) and two equivalent P(2) atoms to form distorted GaP4 tetrahedra that share corners with two equivalent Eu(2)P6 octahedra, corners with two equivalent Ga(1)P4 tetrahedra, edges with two equivalent Eu(2)P6 octahedra, and  an edgeedge with one Ga(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-57°. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 7-coordinate geometry to one Eu(2), four equivalent Eu(1), and two equivalent Ga(1) atoms. In the second P site, P(2) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing PEu4Ga2 pentagonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3(GaP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.210
_cell_length_b   8.210
_cell_length_c   6.566
_cell_angle_alpha   89.413
_cell_angle_beta   89.413
_cell_angle_gamma   76.060
_symmetry_Int_Tables_number   1
_cell_volume   429.497
_cell_formula_units_Z   2
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  0.749  0.495  0.035  1.0
  Eu  Eu1  1  0.505  0.251  0.465  1.0
  Eu  Eu2  1  0.251  0.505  0.965  1.0
  Eu  Eu3  1  0.495  0.749  0.535  1.0
  Eu  Eu4  1  0.100  0.900  0.250  1.0
  Eu  Eu5  1  0.900  0.100  0.750  1.0
  Ga  Ga6  1  0.082  0.325  0.415  1.0
  Ga  Ga7  1  0.675  0.918  0.085  1.0
  Ga  Ga8  1  0.918  0.675  0.585  1.0
  Ga  Ga9  1  0.325  0.082  0.915  1.0
  P  P10  1  0.212  0.559  0.475  1.0
  P  P11  1  0.441  0.788  0.025  1.0
  P  P12  1  0.788  0.441  0.525  1.0
  P  P13  1  0.559  0.212  0.975  1.0
  P  P14  1  0.069  0.242  0.067  1.0
  P  P15  1  0.758  0.931  0.433  1.0
  P  P16  1  0.931  0.758  0.933  1.0
  P  P17  1  0.242  0.069  0.567  1.0
[/CIF]
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The structure described by Eu3(GaP2)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to two equivalent P(2) and four equivalent P(1) atoms. In the second Eu site, Eu(2) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form distorted EuP6 octahedra that share corners with four equivalent Ga(1)P4 tetrahedra, edges with two equivalent Eu(2)P6 octahedra, and edges with four equivalent Ga(1)P4 tetrahedra. Ga(1) is bonded to two equivalent P(1) and two equivalent P(2) atoms to form distorted GaP4 tetrahedra that share corners with two equivalent Eu(2)P6 octahedra, corners with two equivalent Ga(1)P4 tetrahedra, edges with two equivalent Eu(2)P6 octahedra, and  an edgeedge with one Ga(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-57°. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 7-coordinate geometry to one Eu(2), four equivalent Eu(1), and two equivalent Ga(1) atoms. In the second P site, P(2) is bonded to two equivalent Eu(1), two equivalent Eu(2), and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing PEu4Ga2 pentagonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3(GaP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.210
_cell_length_b   8.210
_cell_length_c   6.566
_cell_angle_alpha   89.413
_cell_angle_beta   89.413
_cell_angle_gamma   76.060
_symmetry_Int_Tables_number   1
_cell_volume   429.497
_cell_formula_units_Z   2
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  0.749  0.495  0.035  1.0
  Eu  Eu1  1  0.505  0.251  0.465  1.0
  Eu  Eu2  1  0.251  0.505  0.965  1.0
  Eu  Eu3  1  0.495  0.749  0.535  1.0
  Eu  Eu4  1  0.100  0.900  0.250  1.0
  Eu  Eu5  1  0.900  0.100  0.750  1.0
  Ga  Ga6  1  0.082  0.325  0.415  1.0
  Ga  Ga7  1  0.675  0.918  0.085  1.0
  Ga  Ga8  1  0.918  0.675  0.585  1.0
  Ga  Ga9  1  0.325  0.082  0.915  1.0
  P  P10  1  0.212  0.559  0.475  1.0
  P  P11  1  0.441  0.788  0.025  1.0
  P  P12  1  0.788  0.441  0.525  1.0
  P  P13  1  0.559  0.212  0.975  1.0
  P  P14  1  0.069  0.242  0.067  1.0
  P  P15  1  0.758  0.931  0.433  1.0
  P  P16  1  0.931  0.758  0.933  1.0
  P  P17  1  0.242  0.069  0.567  1.0
[/CIF]
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