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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LiDySe2 by Materials Project

LiDySe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Li1+ is bonded to six equivalent Se2- atoms to form LiSe6 octahedra that share corners with six equivalent DySe6 octahedra, edges with six equivalent LiSe6 octahedra, and edges with six equivalent DySe6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Li–Se bond lengths are 2.85 Å. Dy3+ is bonded to six equivalent Se2- atoms to form DySe6 octahedra that share corners with six equivalent LiSe6 octahedra, edges with six equivalent LiSe6 octahedra, and edges with six equivalent DySe6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Dy–Se bond lengths are 2.87 Å. Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiDySe2 by Materials Project

LiDySe2 is Caswellsilverite-like structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Li1+ is bonded to six Se2- atoms to form LiSe6 octahedra that share corners with two equivalent DySe6 octahedra, corners with four equivalent LiSe6 octahedra, edges with four equivalent LiSe6 octahedra, and edges with eight equivalent DySe6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are four shorter (2.85 Å) and two longer (2.93 Å) Li–Se bond lengths. Dy3+ is bonded to six Se2- atoms to form DySe6 octahedra that share corners with two equivalent LiSe6 octahedra, corners with four equivalent DySe6 octahedra, edges with four equivalent DySe6 octahedra, and edges with eight equivalent LiSe6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are four shorter (2.85 Å) and two longer (2.86 Å) Dy–Se bond lengths. There are five inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are two shorter (2.85 Å) and one longer (2.86 Å) Se–Dy bond lengths. In the second Se2- site, Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the third Se2- site, Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are two shorter (2.85 Å) and one longer (2.86 Å) Se–Dy bond lengths. In the fourth Se2- site, Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the fifth Se2- site, Se2- is bonded to three equivalent Li1+ and three equivalent Dy3+ atoms to form a mixture of corner and edge-sharing SeLi3Dy3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are two shorter (2.85 Å) and one longer (2.93 Å) Se–Li bond lengths. There are two shorter (2.85 Å) and one longer (2.86 Å) Se–Dy bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiDySe2 by Materials Project

LiDySe2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Li1+ is bonded to six Se2- atoms to form LiSe6 octahedra that share corners with six equivalent LiSe6 octahedra, edges with four equivalent LiSe6 octahedra, and edges with eight equivalent DySe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.79 Å) and four longer (2.89 Å) Li–Se bond lengths. Dy3+ is bonded to six Se2- atoms to form DySe6 octahedra that share corners with six equivalent DySe6 octahedra, edges with four equivalent DySe6 octahedra, and edges with eight equivalent LiSe6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.79 Å) and four longer (2.89 Å) Dy–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to two equivalent Li1+ and four equivalent Dy3+ atoms to form a mixture of edge and corner-sharing SeLi2Dy4 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second Se2- site, Se2- is bonded to four equivalent Li1+ and two equivalent Dy3+ atoms to form SeLi4Dy2 octahedra that share corners with six equivalent SeLi4Dy2 octahedra and edges with twelve SeLi2Dy4 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗