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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on InAgSe2 by Materials Project

AgInSe2 is Chalcopyrite structured and crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Ag1+ is bonded to four equivalent Se2- atoms to form AgSe4 tetrahedra that share corners with four equivalent AgSe4 tetrahedra and corners with eight equivalent InSe4 tetrahedra. All Ag–Se bond lengths are 2.68 Å. In3+ is bonded to four equivalent Se2- atoms to form InSe4 tetrahedra that share corners with four equivalent InSe4 tetrahedra and corners with eight equivalent AgSe4 tetrahedra. All In–Se bond lengths are 2.65 Å. Se2- is bonded to two equivalent Ag1+ and two equivalent In3+ atoms to form corner-sharing SeIn2Ag2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InAgSe2 by Materials Project

AgInSe2 is Caswellsilverite-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Ag1+ is bonded to six Se2- atoms to form AgSe6 octahedra that share corners with two equivalent InSe6 octahedra, corners with four equivalent AgSe6 octahedra, edges with four equivalent AgSe6 octahedra, and edges with eight equivalent InSe6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Ag–Se bond distances ranging from 2.83–3.01 Å. In3+ is bonded to six Se2- atoms to form InSe6 octahedra that share corners with two equivalent AgSe6 octahedra, corners with four equivalent InSe6 octahedra, edges with four equivalent InSe6 octahedra, and edges with eight equivalent AgSe6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of In–Se bond distances ranging from 2.79–2.84 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to three equivalent Ag1+ and three equivalent In3+ atoms to form a mixture of edge and corner-sharing SeIn3Ag3 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. In the second Se2- site, Se2- is bonded to three equivalent Ag1+ and three equivalent In3+ atoms to form a mixture of edge and corner-sharing SeIn3Ag3 octahedra. The corner-sharing octahedra tilt angles range from 0–4°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InAgSe2 by Materials Project

AgInSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Ag1+ is bonded to six equivalent Se2- atoms to form AgSe6 octahedra that share corners with six equivalent InSe6 octahedra, edges with six equivalent AgSe6 octahedra, and edges with six equivalent InSe6 octahedra. The corner-sharing octahedral tilt angles are 2°. All Ag–Se bond lengths are 2.88 Å. In3+ is bonded to six equivalent Se2- atoms to form InSe6 octahedra that share corners with six equivalent AgSe6 octahedra, edges with six equivalent AgSe6 octahedra, and edges with six equivalent InSe6 octahedra. The corner-sharing octahedral tilt angles are 2°. All In–Se bond lengths are 2.82 Å. Se2- is bonded to three equivalent Ag1+ and three equivalent In3+ atoms to form a mixture of corner and edge-sharing SeIn3Ag3 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InAgSe2 by Materials Project

AgInSe2 is Enargite-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Ag1+ is bonded to four Se2- atoms to form AgSe4 tetrahedra that share corners with six equivalent AgSe4 tetrahedra and corners with six equivalent InSe4 tetrahedra. There are three shorter (2.62 Å) and one longer (2.75 Å) Ag–Se bond lengths. In3+ is bonded to four Se2- atoms to form InSe4 tetrahedra that share corners with six equivalent AgSe4 tetrahedra and corners with six equivalent InSe4 tetrahedra. There are one shorter (2.55 Å) and three longer (2.76 Å) In–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to one Ag1+ and three equivalent In3+ atoms to form corner-sharing SeIn3Ag tetrahedra. In the second Se2- site, Se2- is bonded to three equivalent Ag1+ and one In3+ atom to form corner-sharing SeInAg3 tetrahedra.

36 MATERIALS SCIENCE↗