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.
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. The Eu(1)-O(16) bond length is 2.82 Å. The Eu(1)-O(8) bond length is 2.94 Å. There is one shorter (2.58 Å) and one longer (2.59 Å) Eu(1)-O(3) bond length. There is one shorter (2.71 Å) and one longer (2.73 Å) Eu(1)-O(4) bond length. There is one shorter (2.61 Å) and one longer (2.62 Å) Eu(1)-O(7) bond length. 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. The Eu(2)-O(1) bond length is 2.83 Å. The Eu(2)-O(9) bond length is 2.81 Å. There is one shorter (2.61 Å) and one longer (2.63 Å) Eu(2)-O(2) bond length. There is one shorter (2.73 Å) and one longer (2.74 Å) Eu(2)-O(5) bond length. There is one shorter (2.60 Å) and one longer (2.62 Å) Eu(2)-O(6) bond length. 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. The Eu(3)-O(16) bond length is 2.85 Å. The Eu(3)-O(8) bond length is 2.78 Å. Both Eu(3)-O(11) bond lengths are 2.59 Å. There is one shorter (2.73 Å) and one longer (2.74 Å) Eu(3)-O(12) bond length. There is one shorter (2.60 Å) and one longer (2.65 Å) Eu(3)-O(15) bond length. 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. The Eu(4)-O(1) bond length is 2.82 Å. The Eu(4)-O(9) bond length is 2.89 Å. There is one shorter (2.60 Å) and one longer (2.62 Å) Eu(4)-O(10) bond length. There is one shorter (2.71 Å) and one longer (2.72 Å) Eu(4)-O(13) bond length. There is one shorter (2.58 Å) and one longer (2.61 Å) Eu(4)-O(14) bond length. 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°. The Y(1)-O(16) bond length is 2.26 Å. The Y(1)-O(2) bond length is 2.28 Å. There is one shorter (2.35 Å) and one longer (2.36 Å) Y(1)-O(15) bond length. Both Y(1)-O(4) bond lengths are 2.32 Å. 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°. The Y(2)-O(14) bond length is 2.33 Å. The Y(2)-O(5) bond length is 2.29 Å. There is one shorter (2.22 Å) and one longer (2.23 Å) Y(2)-O(1) bond length. There is one shorter (2.38 Å) and one longer (2.39 Å) Y(2)-O(3) bond length. 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°. The Y(3)-O(11) bond length is 2.35 Å. The Y(3)-O(4) bond length is 2.30 Å. Both Y(3)-O(6) bond lengths are 2.38 Å. Both Y(3)-O(8) bond lengths are 2.22 Å. 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°. The Y(4)-O(7) bond length is 2.28 Å. The Y(4)-O(9) bond length is 2.25 Å. Both Y(4)-O(10) bond lengths are 2.36 Å. There is one shorter (2.31 Å) and one longer (2.32 Å) Y(4)-O(5) bond length. 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°. The Y(5)-O(10) bond length is 2.28 Å. The Y(5)-O(8) bond length is 2.25 Å. There is one shorter (2.31 Å) and one longer (2.32 Å) Y(5)-O(12) bond length. There is one shorter (2.35 Å) and one longer (2.37 Å) Y(5)-O(7) bond length. 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°. The Y(6)-O(13) bond length is 2.30 Å. The Y(6)-O(6) bond length is 2.34 Å. Both Y(6)-O(11) bond lengths are 2.38 Å. Both Y(6)-O(9) bond lengths are 2.22 Å. 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°. The Y(7)-O(12) bond length is 2.29 Å. The Y(7)-O(3) bond length is 2.32 Å. Both Y(7)-O(14) bond lengths are 2.39 Å. There is one shorter (2.22 Å) and one longer (2.23 Å) Y(7)-O(16) bond length. 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°. The Y(8)-O(1) bond length is 2.26 Å. The Y(8)-O(15) bond length is 2.27 Å. There is one shorter (2.31 Å) and one longer (2.32 Å) Y(8)-O(13) bond length. There is one shorter (2.35 Å) and one longer (2.37 Å) Y(8)-O(2) bond length. 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.