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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CsAg5Se3 by Materials Project

CsAg5Se3 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Cs1+ is bonded in a body-centered cubic geometry to eight Se2- atoms. All Cs–Se bond lengths are 3.82 Å. There are three inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded to four Se2- atoms to form distorted corner-sharing AgSe4 tetrahedra. There are two shorter (2.70 Å) and two longer (2.98 Å) Ag–Se bond lengths. In the second Ag1+ site, Ag1+ is bonded in a distorted trigonal planar geometry to three equivalent Se2- atoms. There are one shorter (2.67 Å) and two longer (2.80 Å) Ag–Se bond lengths. In the third Ag1+ site, Ag1+ is bonded in a 4-coordinate geometry to four Se2- atoms. There are a spread of Ag–Se bond distances ranging from 2.63–2.98 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 4-coordinate geometry to four equivalent Cs1+ and four Ag1+ atoms. In the second Se2- site, Se2- is bonded in a 9-coordinate geometry to two equivalent Cs1+ and seven Ag1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsAg3Se2 by Materials Project

CsAg3Se2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Cs1+ is bonded in a 7-coordinate geometry to seven Se2- atoms. There are a spread of Cs–Se bond distances ranging from 3.69–3.88 Å. There are three inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a distorted bent 120 degrees geometry to four Se2- atoms. There are a spread of Ag–Se bond distances ranging from 2.64–3.20 Å. In the second Ag1+ site, Ag1+ is bonded in a distorted trigonal planar geometry to three Se2- atoms. There are two shorter (2.70 Å) and one longer (2.75 Å) Ag–Se bond lengths. In the third Ag1+ site, Ag1+ is bonded in a distorted trigonal non-coplanar geometry to three Se2- atoms. There are one shorter (2.64 Å) and two longer (2.78 Å) Ag–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 8-coordinate geometry to four equivalent Cs1+ and four Ag1+ atoms. In the second Se2- site, Se2- is bonded in a 9-coordinate geometry to three equivalent Cs1+ and six Ag1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsAgSe4 by Materials Project

CsAgSe4 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Cs1+ is bonded in a 11-coordinate geometry to eleven Se+0.50- atoms. There are a spread of Cs–Se bond distances ranging from 3.73–4.27 Å. Ag1+ is bonded to five Se+0.50- atoms to form distorted corner-sharing AgSe5 tetrahedra. There are a spread of Ag–Se bond distances ranging from 2.65–3.38 Å. There are four inequivalent Se+0.50- sites. In the first Se+0.50- site, Se+0.50- is bonded in a 2-coordinate geometry to three equivalent Cs1+, two equivalent Ag1+, and one Se+0.50- atom. The Se–Se bond length is 2.40 Å. In the second Se+0.50- site, Se+0.50- is bonded in a 1-coordinate geometry to three equivalent Cs1+, one Ag1+, and two Se+0.50- atoms. The Se–Se bond length is 2.42 Å. In the third Se+0.50- site, Se+0.50- is bonded in a 1-coordinate geometry to three equivalent Cs1+, one Ag1+, and one Se+0.50- atom. The Se–Se bond length is 2.38 Å. In the fourth Se+0.50- site, Se+0.50- is bonded in a 4-coordinate geometry to two equivalent Cs1+, one Ag1+, and two Se+0.50- atoms.

36 MATERIALS SCIENCE↗