DOE OSTI2020
EuY2O4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Eu2+ sites. In the first Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.58–2.94 Å. In the second Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.60–2.83 Å. In the third Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.59–2.85 Å. In the fourth Eu2+ site, Eu2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.58–2.89 Å. There are eight inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–65°. There are a spread of Y–O bond distances ranging from 2.26–2.36 Å. In the second Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–63°. There are a spread of Y–O bond distances ranging from 2.22–2.39 Å. In the third Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–65°. There are a spread of Y–O bond distances ranging from 2.22–2.38 Å. In the fourth Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–63°. There are a spread of Y–O bond distances ranging from 2.25–2.36 Å. In the fifth Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–64°. There are a spread of Y–O bond distances ranging from 2.25–2.37 Å. In the sixth Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–64°. There are a spread of Y–O bond distances ranging from 2.22–2.38 Å. In the seventh Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–64°. There are a spread of Y–O bond distances ranging from 2.22–2.39 Å. In the eighth Y3+ site, Y3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing YO6 octahedra. The corner-sharing octahedra tilt angles range from 50–64°. There are a spread of Y–O bond distances ranging from 2.26–2.37 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two Eu2+ and three Y3+ atoms. In the second O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 trigonal bipyramids. In the third O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of edge and corner-sharing OEu2Y3 square pyramids. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Eu2+ and three Y3+ atoms. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Eu2+ and three Y3+ atoms. In the sixth O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 square pyramids. In the seventh O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 trigonal bipyramids. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to two Eu2+ and three Y3+ atoms. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to two Eu2+ and three Y3+ atoms. In the tenth O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 trigonal bipyramids. In the eleventh O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of edge and corner-sharing OEu2Y3 square pyramids. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Eu2+ and three Y3+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Eu2+ and three Y3+ atoms. In the fourteenth O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 square pyramids. In the fifteenth O2- site, O2- is bonded to two equivalent Eu2+ and three Y3+ atoms to form a mixture of distorted edge and corner-sharing OEu2Y3 trigonal bipyramids. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to two Eu2+ and three Y3+ atoms.