The crystal structure described by EuY2O4 crystallizes in the triclinic P1 space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(16), one O(8), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(9), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the third Eu site, Eu(3) is bonded in a 8-coordinate geometry to one O(16), one O(8), two equivalent O(11), two equivalent O(12), and two equivalent O(15) atoms. In the fourth Eu site, Eu(4) is bonded in a 8-coordinate geometry to one O(1), one O(9), two equivalent O(10), two equivalent O(13), and two equivalent O(14) atoms. There are eight inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(16), one O(2), two equivalent O(15), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. In the second Y site, Y(2) is bonded to one O(14), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the third Y site, Y(3) is bonded to one O(11), one O(4), two equivalent O(6), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. In the fourth Y site, Y(4) is bonded to one O(7), one O(9), two equivalent O(10), and two equivalent O(5) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the fifth Y site, Y(5) is bonded to one O(10), one O(8), two equivalent O(12), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the sixth Y site, Y(6) is bonded to one O(13), one O(6), two equivalent O(11), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the seventh Y site, Y(7) is bonded to one O(12), one O(3), two equivalent O(14), and two equivalent O(16) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the eighth Y site, Y(8) is bonded to one O(1), one O(15), two equivalent O(13), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Eu(2), one Eu(4), one Y(8), and two equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Eu(2), one Y(1), and two equivalent Y(8) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Eu(1), one Y(7), and two equivalent Y(2) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Eu(1), one Y(3), and two equivalent Y(1) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Eu(2), one Y(2), and two equivalent Y(4) atoms. In the sixth O site, O(6) is bonded to two equivalent Eu(2), one Y(6), and two equivalent Y(3) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the seventh O site, O(7) is bonded to two equivalent Eu(1), one Y(4), and two equivalent Y(5) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Eu(1), one Eu(3), one Y(5), and two equivalent Y(3) atoms. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Eu(2), one Eu(4), one Y(4), and two equivalent Y(6) atoms. In the tenth O site, O(10) is bonded to two equivalent Eu(4), one Y(5), and two equivalent Y(4) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the eleventh O site, O(11) is bonded to two equivalent Eu(3), one Y(3), and two equivalent Y(6) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to two equivalent Eu(3), one Y(7), and two equivalent Y(5) atoms. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to two equivalent Eu(4), one Y(6), and two equivalent Y(8) atoms. In the fourteenth O site, O(14) is bonded to two equivalent Eu(4), one Y(2), and two equivalent Y(7) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the fifteenth O site, O(15) is bonded to two equivalent Eu(3), one Y(8), and two equivalent Y(1) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the sixteenth O site, O(16) is bonded to one Eu(1), one Eu(3), one Y(1), and two equivalent Y(7) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. is represented by the CIF card [CIF]
data_EuY2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.166
_cell_length_b   11.998
_cell_length_c   3.422
_cell_angle_alpha   89.837
_cell_angle_beta   90.198
_cell_angle_gamma   90.184
_symmetry_Int_Tables_number   1
_cell_volume   417.358
_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
  Eu  Eu0  1  0.244  0.351  0.755  1.0
  Eu  Eu1  1  0.253  0.848  0.248  1.0
  Eu  Eu2  1  0.746  0.149  0.756  1.0
  Eu  Eu3  1  0.755  0.650  0.256  1.0
  Y  Y4  1  0.075  0.113  0.750  1.0
  Y  Y5  1  0.078  0.609  0.755  1.0
  Y  Y6  1  0.421  0.109  0.251  1.0
  Y  Y7  1  0.427  0.612  0.249  1.0
  Y  Y8  1  0.574  0.387  0.751  1.0
  Y  Y9  1  0.579  0.890  0.755  1.0
  Y  Y10  1  0.919  0.390  0.253  1.0
  Y  Y11  1  0.926  0.888  0.251  1.0
  O  O12  1  0.021  0.717  0.254  1.0
  O  O13  1  0.080  0.923  0.749  1.0
  O  O14  1  0.124  0.476  0.254  1.0
  O  O15  1  0.209  0.177  0.250  1.0
  O  O16  1  0.291  0.673  0.750  1.0
  O  O17  1  0.373  0.977  0.753  1.0
  O  O18  1  0.420  0.422  0.253  1.0
  O  O19  1  0.484  0.215  0.751  1.0
  O  O20  1  0.518  0.784  0.255  1.0
  O  O21  1  0.580  0.577  0.751  1.0
  O  O22  1  0.627  0.022  0.255  1.0
  O  O23  1  0.708  0.324  0.251  1.0
  O  O24  1  0.792  0.823  0.753  1.0
  O  O25  1  0.873  0.523  0.753  1.0
  O  O26  1  0.922  0.077  0.249  1.0
  O  O27  1  0.979  0.283  0.753  1.0
[/CIF]
.
The crystal structure described by EuY2O4 crystallizes in the triclinic P1 space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(16), one O(8), two equivalent O(3), two equivalent O(4), and two equivalent O(7) atoms. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(9), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the third Eu site, Eu(3) is bonded in a 8-coordinate geometry to one O(16), one O(8), two equivalent O(11), two equivalent O(12), and two equivalent O(15) atoms. In the fourth Eu site, Eu(4) is bonded in a 8-coordinate geometry to one O(1), one O(9), two equivalent O(10), two equivalent O(13), and two equivalent O(14) atoms. There are eight inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(16), one O(2), two equivalent O(15), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. In the second Y site, Y(2) is bonded to one O(14), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the third Y site, Y(3) is bonded to one O(11), one O(4), two equivalent O(6), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. In the fourth Y site, Y(4) is bonded to one O(7), one O(9), two equivalent O(10), and two equivalent O(5) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-63°. In the fifth Y site, Y(5) is bonded to one O(10), one O(8), two equivalent O(12), and two equivalent O(7) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the sixth Y site, Y(6) is bonded to one O(13), one O(6), two equivalent O(11), and two equivalent O(9) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the seventh Y site, Y(7) is bonded to one O(12), one O(3), two equivalent O(14), and two equivalent O(16) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. In the eighth Y site, Y(8) is bonded to one O(1), one O(15), two equivalent O(13), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 50-64°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Eu(2), one Eu(4), one Y(8), and two equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Eu(2), one Y(1), and two equivalent Y(8) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Eu(1), one Y(7), and two equivalent Y(2) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Eu(1), one Y(3), and two equivalent Y(1) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to two equivalent Eu(2), one Y(2), and two equivalent Y(4) atoms. In the sixth O site, O(6) is bonded to two equivalent Eu(2), one Y(6), and two equivalent Y(3) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the seventh O site, O(7) is bonded to two equivalent Eu(1), one Y(4), and two equivalent Y(5) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Eu(1), one Eu(3), one Y(5), and two equivalent Y(3) atoms. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Eu(2), one Eu(4), one Y(4), and two equivalent Y(6) atoms. In the tenth O site, O(10) is bonded to two equivalent Eu(4), one Y(5), and two equivalent Y(4) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the eleventh O site, O(11) is bonded to two equivalent Eu(3), one Y(3), and two equivalent Y(6) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to two equivalent Eu(3), one Y(7), and two equivalent Y(5) atoms. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to two equivalent Eu(4), one Y(6), and two equivalent Y(8) atoms. In the fourteenth O site, O(14) is bonded to two equivalent Eu(4), one Y(2), and two equivalent Y(7) atoms to form a mixture of corner and edge-sharing OEu2Y3 square pyramids. In the fifteenth O site, O(15) is bonded to two equivalent Eu(3), one Y(8), and two equivalent Y(1) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. In the sixteenth O site, O(16) is bonded to one Eu(1), one Eu(3), one Y(1), and two equivalent Y(7) atoms to form a mixture of distorted corner and edge-sharing OEu2Y3 trigonal bipyramids. is represented by the CIF card [CIF]
data_EuY2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.166
_cell_length_b   11.998
_cell_length_c   3.422
_cell_angle_alpha   89.837
_cell_angle_beta   90.198
_cell_angle_gamma   90.184
_symmetry_Int_Tables_number   1
_cell_volume   417.358
_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
  Eu  Eu0  1  0.244  0.351  0.755  1.0
  Eu  Eu1  1  0.253  0.848  0.248  1.0
  Eu  Eu2  1  0.746  0.149  0.756  1.0
  Eu  Eu3  1  0.755  0.650  0.256  1.0
  Y  Y4  1  0.075  0.113  0.750  1.0
  Y  Y5  1  0.078  0.609  0.755  1.0
  Y  Y6  1  0.421  0.109  0.251  1.0
  Y  Y7  1  0.427  0.612  0.249  1.0
  Y  Y8  1  0.574  0.387  0.751  1.0
  Y  Y9  1  0.579  0.890  0.755  1.0
  Y  Y10  1  0.919  0.390  0.253  1.0
  Y  Y11  1  0.926  0.888  0.251  1.0
  O  O12  1  0.021  0.717  0.254  1.0
  O  O13  1  0.080  0.923  0.749  1.0
  O  O14  1  0.124  0.476  0.254  1.0
  O  O15  1  0.209  0.177  0.250  1.0
  O  O16  1  0.291  0.673  0.750  1.0
  O  O17  1  0.373  0.977  0.753  1.0
  O  O18  1  0.420  0.422  0.253  1.0
  O  O19  1  0.484  0.215  0.751  1.0
  O  O20  1  0.518  0.784  0.255  1.0
  O  O21  1  0.580  0.577  0.751  1.0
  O  O22  1  0.627  0.022  0.255  1.0
  O  O23  1  0.708  0.324  0.251  1.0
  O  O24  1  0.792  0.823  0.753  1.0
  O  O25  1  0.873  0.523  0.753  1.0
  O  O26  1  0.922  0.077  0.249  1.0
  O  O27  1  0.979  0.283  0.753  1.0
[/CIF]
.